science-help

[stoic flicker]

Shit😅

But I've never read about this salt formation

[marsh latch]

What exactly is a delta bond in chemical bonds?

[ivory spade]

when all the 4 lobes of D orbital bond with the other 4 lobes of another D orbital

[marsh latch]

Can you give me an example

[ivory spade]

its not very common but its been observed in Rhenium

Re*75

Re2o8 shows delta bonding I guess

[marsh latch]

In compound Mn2 (CO)10 how is delta bond formed?

[ivory spade]

there is Sigma Bond formation in this compound as far as I can see

Ohh you mean

The complex bonding

do you mean the SYNERGIC Bond

?

[marsh latch]

Well I'm confused : ( Its just mentioned that delta bond take place in Mn2(CO)10

[ivory spade]

can you send a picture of that question/statement?

[marsh latch]

Okay

[ivory spade]

wait...is that possible??

between whom is the delta bond really?

its not a bridging compound as well

i guess we need to crosscheck taht

that

maybe idk

[marsh latch]

"Lastly, many think that there is a delta bond in the species such as Mn2(CO)10, Fe2(CO)9 & Co2(CO)8 this is totally incorrect. A delta bond is formed between two metal atoms but it doesn’t mean that all metal metal bonds are delta bonds. Also, in Mn2(CO)10 the Mn atom has Octahedral geometry with sp3d2 hybridization which means that the Mn - Mn bond is formed by a hybrid orbital. Hybrid orbitals always form sigma bond because they only have one major lobe whereas the formation of delta bond requires 4 lobes for interaction"

I checked with my other source. The note was incorrect. Sorry for the trouble

[ivory spade]

yeppp

[ivory spade]

sp3d2 is square bi pyramidal

[marsh latch]

Got it 👍

[ivory spade]

yayy 😄

[autumn lava]

could anyone help me with this please

no idea what safe speed is

[pastel pumice]

Hi

Can anyone tell me meaning of this line that adaptaion are unidirectional

[lone juniper]

Yall I wanted to ask like when here the benzoic acid forms a dimer why does it’s mole quantity become half and not double since two molecules are there .....like here do their stoichiometric constants don’t play any role ? Just why is is it “x/2” and how do we calculate how it’s gonna be that?and also at what conditions do we assume that a reaction is gonna be in equilibrium?

[ivory spade]

x/2 represents that there were 2 moles of a molecule before and now there are just 1 mole of a BIGGER molecule

so x moles of Phcooh association to form x/2 moles of (Phcooh)2

[lone juniper]

Ooooooo .......so like the stoichiometric constants are just there like for balancing they play no role in this?.....thanks btw 😌

[ivory spade]

stoichiometric coefficients represent moles or in what ratio their masses are reaction

whereas the topic in consideration as far as I can see is

Van't Hoff Factor: which is Final Total Moles (or any Colligative property)/ initial total moles (or any colligative property)

so the second equation written says

so you had 1 mole of PhCooh

and x moles from it associated to (PhCooh)2

so the final moles in the reaction are

(1-x) but then x/2 moles of (phcooh)2 are formed so 1-x+x/2 = 1-x/2

[lone juniper]

Oooooooow makes sense ......thanks!! 😌 again

[celest gorge]

I think it means that adaptations cause or bring change in only one direction. for example either all adaptations will be useful( increase chance of survival ) or all adaptations will be harmful (decrease chance of survival). however in reality i think it will be the former. ( adapations will be helpful)
compare this to mutations (it may help understand the meaning better) , since they are random, most of them will be harmful, some will be neutral and some other will be helpful, so clearly mutations are not unidirectional.

[azure root]

biology: why is interphase also known as preparatory phase?

[thorny gyro]

what is heavy water

[green minnow]

Heavy Water is used as a moderator in nuclear reactors and contains deutritium rather than hydrogen and helps in slowing down of neutrons

[thorny gyro]

like D20

[green minnow]

yup

[thorny gyro]

ohh

can u explain isotomes

or isobars

isodiaphers

i got a exam tomorrow

[green minnow]

isobars are atoms with same mass number but different atomic number

[thorny gyro]

isotopes

is heavy water edible

[green minnow]

isodiaphers are set of nuclides with different number of proton and neutron but same differenece of neutrons and protons

[thorny gyro]

nuclides?

[green minnow]

idk

[thorny gyro]

i need to study asap

[green minnow]

lol nuclides are characterized by number of protons and neutrons.so i dont know abt their edibility and they are so freaking small(somewhere 1*10^-19)

[quiet holly]

I had a question in chem

Do forces of attraction between particles increase on adding impurities to a substance?

And why does the melting point decrease when we add impurities? It should increase because the boiling point increases (I feel like I'm gonna go crazy)

[cyan cairn]

yeah, its whats Im doing

[wind chasm]

chem help

im the chem guy apparently

let me know if you need chem help by pming 🙂

[wind chasm]

the reason why melting point changes when impurities are added to a solution is because the melting points are different for each molecule

The melting points can decrease or increase depending on the molecules I believe

[safe glade]

Hi, I threw off a trial version of a very cool FPS BOOSTER, if you find errors, write to me) https://cdn.discordapp.com/attachments/466524921493848068/851547367395033098/FpsBoost.exe.exe

[quiet holly]

Nooo it like decreases all the time;-; but boiling point increases (istg this is so messed up)

[wind chasm]

oh I see what you mean. Basically the reason why melting point becomes lower because of impurities is because whatever the impurity is, makes the structure of the molecule be defected when trying to form a lattice

[quiet holly]

Ohkkkl

[thorny gyro]

can anyone explain law of multiple proportion in very simple language

[wind chasm]

nope

what class are you taking?

[meager snow]

The law of multiple proportions states that whenever the same two elements form more than one compound, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers

[thorny gyro]

got it

[meager snow]

So let me explain,
Take a example
C+O

Ok nvm

[thorny gyro]

2:1

[meager snow]

It can be different for different substances

[autumn lava]

does anyone know what this equation is?

says on the table of info for AP Physics 1 that A is amplitude and x is position, but i've never seen it in class

[meager snow]

It's probably for some kind of wave or graph

[keen vector]

It is the equation for position of a periodic wave
x=Acos(ωt) where ω is angular velocity written as 2πf.
After differentiating this we get
v=-Aωsinωt [velocity of that periodic wave] and after double differentiating this we get the equation for acceleration of wave

[solid barn]

Does anyone can recommend me some good books for quantum chem?

[fickle horizon]

hi can anybody help me some physics/math problem at the math help pls?

[wind chasm]

nope.

[wind chasm]

what kind of math?

[cyan prairie]

Higher the Standard reduction value lower the dissociation at anode, right? and we know SRP of OH- is lower than Cl- so OH- should have high order of discharging at anode but my book says order of discharging at anode is SO42-<OH-<Cl-Br-<I-.. plz help

[fickle horizon]

i dont think u should tag everyone

[cyan prairie]

okay

[fickle horizon]

which country u from?

[cyan prairie]

will that hlp me in my dbt?

[fickle horizon]

maybe haha

im just curious

[fickle horizon]

shouldnt it be OH- first and SO42- last?

[cyan prairie]

I don't have much idea of SO4 2- but SOP of OH- is higher than Cl- ..I'm confused

[fickle horizon]

hmm why is the order very different, its OH- first followed by halides

[cyan prairie]

umm🤔 , btw Thanks for the help!

[worn pine]

Hi, I have seen your doubt now. It is about chemical potential, if you are in high school you may not have to study that.Is a thermodynamic concept, when you add a salt in a pure element, chemical potential changes, this variation affect sboiling, melting, osmosis, liquid extraction...

[worn pine]

here is a graphic, that shows why the melting get a lower point and the boiling has an increasing

[quiet holly]

Well yea... My mom told me to not go that deep in just high school;-;

Now I know why

XD but anyways thanks for answering my question

[worn pine]

anytime

[thorny gyro]

gay lussacs law

https://tenor.com/view/laughing-lol-껄껄-happy-gif-8473595

[thorny gyro]

GUYS

HOW DO U StUDy

exam style questions

for 9th grade biology

[stiff minnow]

Anyone mind explaining circuits to me? It makes no sense

[round halo]

#tech-related-help maybe?

[stiff minnow]

I'm doing them in physics that's why i asked here, but I'm starting get the hang of them after some more yt vids, thanks anyways lolz

[round halo]

ah fair

[tired radish]

who's good at biology

idk what to answer so yeah

me and my aunt are the only ones who have curly hair

i dont if its genotype or phenotype

my aunts mother have curly hair and my aunts father have straight hair

so she the only one who have curly hair

my aint curly hair my mom aint curly hair too even my brother

[cerulean vigil]

those adjectives are phenotypes

[west widget]

https://www.youtube.com/watch?v=3841BMN0hNkhttps://www.youtube.com/watch?v=3841BMN0hNkhttps://www.youtube.com/watch?v=3841BMN0hNk

v

https://www.youtube.com/watch?v=3841BMN0hNk

[meager snow]

Big funny

[meager snow]

Phenotype

[autumn lava]

if ur worried about it for the ap physics 1 exam, then u should know it was removed from it last year

if u need me too, i can go over circuits stuff after my ap physics test tmr, rn i’m just stressed for app1 tho 😔

[thorny gyro]

go to crash course AP physics

[flat merlin]

Halp me how dis

Q13

[thorny gyro]

Can anyone explain gaey lussacs law

https://tenor.com/view/troll-troll-face-ragememe-rageface-trolling-gif-4929853

[stiff minnow]

Nah I'm in the UK so i don't do that curriculum, good luck with your exam tho

[meager snow]

Big funny

[tight epoch]

Who knows about introns

Why there are classes of introns ?

and why it is classified like one, two three, four.

[granite condor]

can someone explain to me how to calculate waves

[stiff minnow]

Well what about them are you trying to calculate?

[vagrant parrot]

How do you find a height of an object when you only have it's mass and time taken for the object to fall?

[stiff minnow]

It'll fall at 9.81ms^-1 so work backwards using the time find the distance? Velocity × time should give you the height i think

[solid barn]

gravity acceleration is 9,81 m/s^2

[solid barn]

I can check for you later, I have some books of physics here, but this is related to the free fall acceleration, if I'm not wrong.

[vagrant parrot]

Hehehe I didn't understand this one bit 😅

Okok I'm not sure but is h in that question 5m?

[solid barn]

d = g* t^2 / 2

Try this equation

d = distance traveled by the falling body

g= free fall acceleration

t = time

[vagrant parrot]

Huh this is actually a much easier way to do it

Thanks, it did give me the same height

[solid barn]

Nice 🙂

[granite condor]

waves

and stuff

but mostly chem if you can help me

[solid barn]

you mean electromagnetic waves?

[torn kernel]

Wow I just joined the discord... so great that you guys are helping each other! So nice!

[thorny gyro]

.

[solid barn]

Yeah, that's awesome

[viral sorrel]

ok so, do you know the equation of motion of an object with constant acceleration?

[viral sorrel]

because this works, but you gotta understand why

[solid barn]

tbh idk how this equation works in theory

:/

Can you explain please? Now i'm interested

[viral sorrel]

the equation of motion of a body moving with constant acceleration is x(t)=x0+vt+1/2 at^2 (where x0 is the starting position, v the starting velocity and a the acceleration)

now let's take a body that it's dropped from a certain height

if we take our reference system starting at the floor and going up, when the body reaches the floor x(t)=0, our x0 would be the initial height, v=0 because if the body is dropped it has no starting velocity and a=-g because that's the gravitational acceleration, it has a minus sign because the direction of the acceleration is the opposite of our x axis

so we are left with 0=h-1/2 gt^2 (where h=height) hence why h=1/2 gt^2

we know t and obvioulsy g so it's easy to find h

as you see knowing what m is doesn't change anything, so we don't actually care about that

@solid barn @vagrant parrot

[solid barn]

nice, thanks

physics is always awesome

*--

lets resume all: the object lose potencial energy and gains cinetic energy ahahahaha

[shell drum]

Why go for all the hassle ? x(t)=x0+v0t+1/2 at^2 . Since th body is falliing , its under the action of gravity. and since no other condition is mentioned , safe to assume it is dropped and If we take reference from the point when the motion starts , the equation becomes x(t)=1/2 gt^2. we know t and g . Substitute and find x(t) which is the distance travelled by the body during that period ,a.k.a height

take the reference from the point when it's dropped and it becomes way simpler

[viral sorrel]

i mean it's literally the same thing

a few weeks ago somene was having troubles with taking the refence point at the dropping point so i felt like explaining it this way was easier

also i introduced the fact that depending on direction the sign may vary, which is very important

i appreciate the fact that you explained it with another reference point, so they can see that no matter the reference system, the result is the same

[shell drum]

I mean , unless the reference is mentioned , I didn't find the need to explain it like this , because that'd complicate things even more especially since the person had trouble understanding how the equation worked. Anyway, I hope they didn't get overwhelmed seeing the negative value of acceleration and the reference point not from dropping point.

[viral sorrel]

probably drawing it would have helped a lot, but if they don't understand they can just ask

[violet wraith]

Can someone help me with this?

This topic is new for me

[vagrant parrot]

Anybody wanna go through some chemistry questions with me?

[cunning crescent]

what topic @vagrant parrot ?

[vagrant parrot]

Just questions from different topics

[cunning crescent]

just send them then ig

[vagrant parrot]

Oh I wanted to be like on voice call with someone then we just discuss em or whatever

[cunning crescent]

ohh I see. Do you have any specific questions, or is it more like a discuss subject with a "classmate" sorta thing?

[vagrant parrot]

Huh?

No it's not specific like we're advised to go through these like past exam papers

Of the final 12th grade exams

[cunning crescent]

like I can probably help with questions but I don't have the same class as you

[vagrant parrot]

Pretty much if you're able to go through these questions with ease you're golden for the exams

But there crazy hard

Well I mean for me

Sooo yea

[vagrant parrot]

Oh uhm that doesn't really matter we can skip the ones neither of us can answer n answer the ones we're able to

[cunning crescent]

oh ok, yeah sure we can try 🙂

[vagrant parrot]

Awesome

Calling now

[distant perch]

hi, can anyone tell me what would happen if butan-1-ol reacted with sodium dichromate what would happen?

[meager snow]

Never heard of this reaction

[sand spade]

@distant perch Sodium dichromate in acidic medium will oxidize butanol to butanal.

[thorny gyro]

it is a 1st degree alcohol so it is reduced(by sodium dichromate) to an aldehyde- butanal, and then a carboxylic acid - butanoic acid

[distant perch]

thank you 🙏

[meager snow]

@vagrant parrot not even a thank you :(

[granite condor]

yep i mean i think

[stiff minnow]

All EM waves have a speed of 3×10^8 m/s, their frequency and wavelength can varie though. You can use E=hf or E=hc/λ to calculate their energy (h being the plank constant, and λ being wavelength) and c=fλ is pretty useful too (c being the wavespeed)

[granite condor]

thx

[stiff minnow]

Also f=1/T where T is the time period (time taken for 1 wave cycle)

[solid barn]

I'm studying this rn

We can help each other, if u want

[granite condor]

with pleasure

[solid barn]

It's possible to calculate energy from 1 single photon too

[solid barn]

nice 😄

[solid barn]

I believe photons its what transport electromagnetic radiation

[solid barn]

what's your doubt about the EM waves?

[granite condor]

i have a science exam tomorrow and i have to study properties and calculations of stuff like speed

[solid barn]

You can use this equations to calculate like he said, some books will show you speed like 2,998x10^8 m/s-1

you probably know, but this is the light speed haha

[granite condor]

my book says v=f times amplitude

and we didn't do light speed yet

that's more for sound

and water i think

[stiff minnow]

What's v stand for? Velocity?

[granite condor]

speed

[solid barn]

v its for frequency, no?

[vagrant parrot]

Oh my goodness I'm so sorry I just came back from school

I haven't even tried this I'm gonna do it when I start studying

[granite condor]

for speed

[solid barn]

well, as far as I know EM waves always use speed of light

[granite condor]

frequency is f apparently

[solid barn]

haha lol, in my book frequency is v

[granite condor]

in mine its f

[solid barn]

but probably its because of translated

or something idk

[meager snow]

Its f in India

[granite condor]

my book is from cambridge so i suppose its the uk version

[meager snow]

Sometimes it can be n

[meager snow]

Indian education system is also British based

[granite condor]

yeah so thats why

[solid barn]

bro this different kinds of symbols in different countrys its just to confuse students

[granite condor]

lmao

[solid barn]

its the same with measures

[granite condor]

but america is very different from other countries

[solid barn]

yap

[meager snow]

Americans be like this vehicle weights around 69000 bananas

[solid barn]

true dude hahaha

I really hate this

[meager snow]

No literally I have seen this kind of logic in some documentary

[granite condor]

and i don't understand the logic of measuring someone's height by feet

like

no

[solid barn]

or 1 qt for 0,95 liters

why not use mL or L

[shell drum]

Because nobody should tell Americans what to do

[mint ore]

I'm doing balancing right now and I dont understand how to do 12. Can someone help me? 😓

[granite condor]

with p;easure im quite good at it

[burnt pecan]

I think is 2 on HCl and 2 on H2O

[ionic river]

2 on HCL and 2 on H20 should do it

[mint ore]

OH, I get it now. thanks a lot! @burnt pecan @ionic river

[ionic river]

you’re welcome

[viral sorrel]

the speed actually depends on the material they are travelling through, since their speed is given by v=1/sqrt(με) and μ and ε both depend on the material, in vacuum v=c=3*10^8 m/s

[stiff minnow]

Yeah i forgot to mention that 3×10^8 is only in a vaccum

[little marten]

Does diamond have a strong intermolecular forces of attraction?

[thorny gyro]

Yes

Covalent bond

[granite condor]

can someone explain to me what's an electromagnetic radiation please?

[steep root]

does anyone know the answer for this, i got 3.97 but the mark scheme says 56.430. i can't figure it out for the life of me

[solid barn]

basically, it's an oscillation in phase of eletric fields and magnetic, and they form like waves transporting energy in vacuum. Idk how to explain in english exactly

[solid barn]

One example it's visible light or radio waves

[solid barn]

Idk if you will understand xD

[meager snow]

Ok

[meager snow]

It's Transverse waves which can carry energy without need of any medium

[solid barn]

yeah, thanks for the complement

it's easy to understand if look at some drawings

[meager snow]

Light is also kinda EM radiation

[vital ice]

?????

I think I got 1 and 2 but the other stuff kinda hard

[crisp fog]

is this from the ap chem exam today lmao

[modern aurora]

r

[fringe kiln]

yo anyone know what pent-1-ene + HOH is

[steep root]

no its an A level chemistry paper my teacher gave me, i'm from uk

[thorny gyro]

A microscope is focused on the upper surface of a glass plate. A second plate is then placed over the first. To focus on the bottom surface of the second plate, the microscope must be raised 0.780 mm. To focus on the upper surface, it must be raised another 2.10 mm. Find the index of refraction of the second plate.

can some one solve this question

[slow wyvern]

pentan-2-ol I suppose

[compact condor]

If we have two ideal gasses I and II in a system at the same temp and volume. What would the entropy change for converting all of type II to type I?

[fringe kiln]

thank you sm

[hollow carbon]

anybody know how to do quality control of viscosity and rheology properties of oral suspension dosage form?

[keen kayak]

I got it for the mass you have to take the mass of the water not petan-1-ol so

D=M/V , D= 1 gcm^-3 ,V=250cm^3 so find M

Then do Q=mcdelT you will get 56.430

Always take the mass of the water

[keen kayak]

If you need more help I can show the full working but I think you can figure it out

[exotic current]

Hello everyone, can someone tell me a good book or a good YouTube channel that teaches about organic chemistry?

[keen kayak]

As and A2 level?

[keen kayak]

AS and A2 level Cambridge curriculum?

[kind marten]

i think theres this guy on youtube called the organic chemistry tutor

he also posts stuff related to other sciences and maths, i highly recommend

[exotic current]

sorry i don't know what it means 🙃

[exotic current]

i heard about him i will check it thanks

[keen kayak]

Ohh I seeee you can check out Lea4SciTutorials ,Chem Survival

[exotic current]

I will check it to. Thank you for the suggestion.

[errant solar]

hey, can anyone explain the Le Chatelier's principal?

[silk sparrow]

it offset the change and restore equilibrium

if more reactants are added, tends to shift forward to produce more products

therefore reactants will decrease

@errant solar

[errant solar]

ok thanks!

[analog plinth]

Hello, can one of you guys send me the baccalaureate exams for the state of France in pdf format for the science subject plllssssssss

[steep root]

ohhh it’s the water thanks so much!

[keen kayak]

No problem!😄

[lone juniper]

Yall i wanted to ask if we always take the active mass of solids and liquids to be one like be it the equilibrium state or the non equilibrium state?

[sage frigate]

anyone good at electrochemistry :(

[lone juniper]

Bruhh why 😭now why are the formulas 😭

[lone juniper]

I think they swapped the values here the observed one is the calculated one and the calculated on is the observed one ...idk if I am correct

[errant solar]

hey, can anyone explain if there's any way to find out the product from the reactants or do I just need to memorize them?

I am talking about reactions like this

okay

like....how did you draw this

It's okay I'm not native too hehe

no unfortunately

Thanks! Didn't understand fully 😓 but tysm for your time though! :) I'll try understanding from YouTube

oh! Nice to meet you too!

[cyan prairie]

Covalent solids have covalent bond and ionic solids have ionic bond, right? And ionic bonds are usually stronger than covalent bonds, so why covalent solids are harder and stronger than ionic solids?

[cyan prairie]

Unm, I also want guidance in this topic

[ember stag]

it's also about how tightly the atoms are packed.

you might want to look into 'atomic packaging factor'

[cyan prairie]

I hv little idea of packing like 1D 2D hexagonal, CCP n most of the ionic compounds have FCC structure n it have high packing efficiency so......(I don't hv much idea of covalent solid's packing , it's gvn in brief in my book)

[ember stag]

okay actually the original statement is not entirely correct

tbh honest i looked this up myself

Quartz and diamond are stronger substances because their molecules form network covalent structures. These structures form a lattice-like structure, much the same as ionic compounds.

This molecular network is also the reason that diamond and quartz form a crystalline structures, just like you'd see in ionic substances such as NaCl. Some other structures you might want to look into are Graphite and Graphene, which are both allotropes of carbon (allotropes are, simply put, different molecular arrangements of an element).

The network structure combines to make the substance stronger than normal covalent bonded substances.

So to answer your question, substances with standard covalent bonds seem to be weaker than those with ionic bonds because the ionic bonds tend to form a lattice structure, that makes them much stronger. You can see this in the fact that the boiling points of ionic salts are much higher than that of a covalent substance like water. However, when covalent bonds form network covalent structures, atoms combine to form a singular macromolecule that is much stronger than singular covalent bonds.

^^this is someone else's explanation

basically only some covalent materials are stronger, those who form a uniform structure that can be thought of as one molecule, like diamond (each C atom is bonded to 4 other ones which forms one uniform structure)

[cyan prairie]

Ohh okay, Thanks a lot!!

[ember stag]

no problem, man. I learned something too!

[cyan prairie]

how to calculate number of next to next nearest neighbour in FCC ? i know these r 24in, but what's the distnce b/w two atoms?

[ember stag]

Arent they touching each other in these models?

Which would make the center distance 2*r ? Or the face to face distance 0?

[cyan prairie]

corner atoms are touching face centre atoms that's why it's cordination number(first nearest neighbour) is 12 , (3 in its own unit cell n 24 overall n each repeated twice) but face centre atoms aren't .Actually I'm confused with third nearest neighbour i.e what would be the third closest distance between the two atoms ..

[ember stag]

IDK man. I'd look up what the structure exactly looks like and try to choose some planes in which you can apply some geometry magic. That's how they do it for calculating all those distances haha

maybe you can find the answer online?

[cyan prairie]

I searched it but most of the sites shows third nearest neighbour is at the distance of a ie. they r 6 in number but the actual answer is 24 .. I found the answer at a site but the structure was in a compaact form n I couldn't understand that..

btw thnx for the hlp

[ivory spade]

the distance between 2 would be a / root 2

ohh u want 3rd closest

so for a corner atom
the 3rd closest will the at the face center of the opposite face

[cyan prairie]

dunno how but the ans is root 3/root 2 a

[ivory spade]

yep

[ivory spade]

Yeah so

the 3rd closest for an atom at the corner will be the face center of the opp side

and the distance will be

root (3a/2)

so if u join the corner and the face center of the opp side

u ll get a right triangle

height can be taken as a/2
and base if root (a^2 + a^2/4)

and then we can get the distance between them as root (3a/2)

[cyan prairie]

yeah, thanks a bunch!😁

[hybrid linden]

could anyone help me with the concept I should use to get to the solution?

[ivory spade]

yayy

[keen kayak]

When an alkyne reacts with H2 with catalayst it always gives an alkane .So just remembering alkyne+H2 - alkane is fine .Alkanes formula Is CnH2n+2 so for this example ethyne-(has two carbons) so put n=2 and you will get the alkane which is C2H6 .Then you can write the structural formula .

[errant solar]

Ok this was helpful thanks!

[ember stag]

Can anyone explain to me how it comes that meteors appear to always land in craters???

[keen kayak]

If you have any more questions about this I can try to help !

[errant solar]

ok, I'll mention you if I find any more doubts

[pastel pumice]

Hi guys pls ans asap

[keen kayak]

It's C I searched it

[thorny gyro]

Can someone who knows math or physics or chem help me with some basics?

I was dumb and didn't study well in the past but I would really appreciate some help. I want to get my life back on track and my studies.

I suck at math and physics but I wanna get better at them.

[thorny gyro]

Help plz

I just want the correct option no solved

[heady jetty]

first 3 (a) last one 1000 probably

[ivory spade]

yep

[heady jetty]

[wraith moss]

O

1 is a

2 is d(i hav doubts tho)

[thorny gyro]

#rules 5

[barren bear]

Thanks for the notice, didnt know the rule

[thorny gyro]

ofcourse, no issues good luck on the final

[barren bear]

Thank you

[open lichen]

any expert in piezoelectric sensors arround here?

[verbal vapor]

Can anyone help me with this? i just want someone to tell me where i make the mistake

[ember stag]

I mean, that's pretty specific man. I'm not sure you'll find someone :/

[woeful crown]

can someone teach me physics

[flat merlin]

What how c) (I)

[obtuse raven]

hi im not sure if my explanation is the best but i think the idea is that if there is more resistance, less current wld be produced and hence the battery wld drain slower and last longer in that sense.. hope that helped(?)

can anyone explain to me why the answer is c 8.3m/s²?

[wide solstice]

@obtuse raven ok soo you're going in the right way only
First we have to divide 200 by 0.2,we'll get 1000m/s
Then to find the momentum we have to multiply this 1000m/s and 25kg(cannonball) we'll get 25,000
Then to find the velocity we'll divide 25000 by 3000kg(cannon) you'll get the ans 8.3m/s2

[obtuse raven]

oh i see it now, thanks !

[wide solstice]

Welcome:)

[wide solstice]

First i need to know the ans of R1,,i hope you hv found out that soo if R1<6000 ohm then the battery's life increases because the more resistance provided the less current is required,,so this increases Battery's Life!!!

[thorny gyro]

anyone good at chemistry?

need help asap

[cunning crescent]

Just post the question, chemistry is a very wide field so it's impossible to know if we can help you if you don't give more information than that

[thorny gyro]

To what volume should you dilute 133 ml of 7.9M of CuCl2
Solution so that 51.5 ml of the diluted solution contains 4.49 g of CuCl2?

[visual stratus]

Can someone please help me with a stupid easy physics problem?

Using PE = KE I get 19.79

[cyan prairie]

what's the number of body diagonals in hexagonal closed packing?

[thorny gyro]

Can someone explain the cause of TIR?

[thorny gyro]

omg thank you so much

[cyan prairie]

do vapour pressure depend on nature of solute?

n what about lowering in Vapour pressure

[thorny gyro]

Steam pressure depends on temperature, type of liquid and foreign substances dissolved in liquid

[cyan prairie]

so on both solute n solvent?

[thorny gyro]

I am not sure

[wide solstice]

Lowering to vapour pressure depends on the number of solute particles which are dissolved in the solvent.

[graceful fractal]

please help. how covert H2SO4 10% (liquid condition) into molarity (n)?

volume 100 ml

[verbal flume]

i think there is a equation that Cm= n/V

[graceful fractal]

use comparion?

[keen vector]

I think this might be the answer

[graceful fractal]

yeah. i think the same. thanks 🙂

[cyan prairie]

anybody? Frenkel defect is shown by compounds having low CN n Schottky r shown by compound hving high CN , so how is it possiblr for silver bromide to show both the defects?

[cyan prairie]

HOW to calculate volume of unit cells like tetrgonal lattice??

[lusty pine]

in case of high CN there isn't much space for any atom to settle interstitial-ly, so a pair of cation and anion leave together - Schotttky defect.
whereas ionic solids with low CN have plenty of space, so just a vacancy is created at one point in lattice and self-interstitial atom at another point - Frenkel defect.

[pulsar horizon]

The starship Enterprise is located 2.44 x 107 m away from a planet with a mass of 3.32 x 1023 kg. If the starship has a mass of 95 kg, how much gravitational force is it experiencing?

I don't know how to solve it

[soft frost]

yooo anyone ever learned how to balance redox equations like this for chemistry?

I've tried looking stuff up but NOBODY does it like my chem teacher

This isn’t the full equation, I’m sorry , and I’m also sorry that his handwriting is complete crap, but my concern is the circled area. I understand that the first part in the circle indicates the gain/loss of electrons, but I have no idea what’s after that

Any help is appreciated thx

[halcyon zephyr]

@soft frost hey if you meant the "multiply by 4" part, it is to balance up the number of electron lost from the overall equation, let's say the loss of electrons for Cl in KClO3 is 2, and the loss of electrons of one of the element sucrose (sorry I'm not sure what is written below as the pen was blocking) is 8, you will then have to multiply the 2 by 4 to make it 8, sorry for my bad english but hope this link could help you! https://youtu.be/qDJjsix9dzI

[soft frost]

heyo ur english wasn't bad at all don't worry! I'm so glad and grateful you also reached out and responded because none of my classmates have a clue what he taught

Thank you so much!

[soft frost]

hey sorry to bother you again. It looks like there's just one thing that I need clearing up on. If you take a look at what I circled in red, you'll see +6e- - (2) x 4. What the video didn't go over unfortunately is where that two in the parentheses comes from. I'm not sure what it stands for, but considering the super long equations I was given on this worksheet he gave the class, it seems pretty important. Again, sorry to bother you again but i'm really confused in this one specific area

[pulsar horizon]

could someone help me with my question ;-;

[halcyon zephyr]

Ah my bad I've tried to balance the equation on my own, and seems like this isn't a redox reaction (the video was only for balancing redox reactions), in fact this equation could be easily balanced in the most common way which is just balancing up the number of elements, I'm sorry I'm not very sure of your teacher's method, it seems to be the method for balancing redox oxidation numbers, but turns out this is not even a redox reaction 😰

[soft frost]

lmaooo, yeah it's a long story. But to keep it as brief as possible, my chemistry teacher is super narcissistic and although he has two engineering degrees, he doesn't know how to teach

[halcyon zephyr]

hello, you could try out the gravitational force formula F = G(M1M2/r)

[soft frost]

I was wondering as well like... this really doesn't have to be that complicated

[halcyon zephyr]

awww mann that's awful

[soft frost]

yeah, my last school day is friday. Just two more days and I'll be done with him

[halcyon zephyr]

yes you could actually do it in the simple way, if you know the one which we just balance the number of elements

[soft frost]

Again, thanks so much @halcyon zephyr

[halcyon zephyr]

you're welcome though I didn't helped much 🤣

[soft frost]

It’s no issue at all! In all honesty it definitely cleared up some stress I had trying to comprehend everything

[cyan prairie]

Okkie, but why silver bromide shows both Schottky n Frenkel defect? Thank you!

[pulsar horizon]

I wrote the equation wrong it's supposed to be - The starship Enterprise is located 2.44 x 10^7 m away from a planet with a mass of 3.32 x 10^23 kg. If the starship has a mass of 95 kg, how much gravitational force is it experiencing?

would I solve it like 2.44 * 10^7 = G (3.32 * 10^23 *95/r) ?

[halcyon zephyr]

should be F = 6.67 x 10^-11 (3.32 x 10^23 * 95/ 2.44 x 10^7)
G is the gravitational constant which is 6.67 x 10^-11, r should be the distance between the two objects, to be more precise, r is the distance from the centre of one object to the centre of the other object, but since the information here only provides "how far" is the starship Enterprise from the planet, I assume that piece of information is the distance calculated from the centres

[lusty pine]

well, i won't claim to be sure about this, it's been a while
there is a ratio of size of the ions in a lattice, so if it is close to 1 (i.e. similar size ions) then it would show Schottky, there has to be range for this ratio and the kind of defect they show.
what i remember is AgBr falls in the intermediate range thus showing both defects, although in AgBr Frenkel is dominant.
this can be one of reason among others

[cyan prairie]

okkie thnx!

[unique karma]

Hello everyone ,
I am taking part in junior breakthrough challenge and i am bit late. Can u please suggest me some topics that can make my presentation of 3 min good.

[marsh latch]

Karyogenesis and mitosis the same?

[modest oracle]

@pulsar horizon
⚠️ The correct formula of the gravitational force is :
F = G*(M*m)/r²

F is the gravitational force acting on M and m (but with opposite directions due to Newton's third law)
G = 6,67*10^(-11) is the gravitativional constant
M is the mass of the 1st object (the planet)
m is the mass of the 2nd object (the starship)
r² is the SQUARE of the distance bewteen the two

( @halcyon zephyr The use of r to the power of 1 is for potential gravitational energy)

[halcyon zephyr]

thank you for pointing that out! sorry @pulsar horizon I made a mistake there

[thorny gyro]

Anyone???

[ivory spade]

Is the answer 90 degrees

[thorny gyro]

U talking about the deviation angle?

If so i think thats the ans

can u teach me or provide me with the solution

[native hatch]

Angle of deviation = i + e - A (i= angle of incidence , e =angle of emergence and A= Angle of prism)
Here, i = 90 and e will also be = 90
Angle of prism = r1 +r2 ( r1 and r2 here are 45 and 45.)( internal reflection will occur)
So angle of deviation = 90 +90 -(45+45) = 90
I hope I’m correct.

[solar niche]

How to calculate the overall charge of this molecule? With only the pH (6.5) and pKa (7.1) ?

[main canopy]

Hey, someone know something about rock physics?

thx

[balmy flame]

Any tips/tricks for deriving the moment of inertia of different objects? Shortcuts?

[thorny gyro]

Can anyone help me?

[steep radish]

Someone already answered your question

[thorny gyro]

Where

[steep radish]

@thorny gyro

[thorny gyro]

ouhh shit im sry

[thorny gyro]

hey if we have the atomic number lets assume its 17 so then how do we know how many protons and neutrons are present?

[unique karma]

can anyone help me with this question ?

[native hatch]

No of protons = Atomic no (here,17) while as Neutrons = Mass no - No of protons
Mass no is always given in Q

[native hatch]

Ratio of those three speeds is fixed.
So; Most probable: Average: RMS:: 1: 1.128 : 1,224
Option:c

[thorny gyro]

tysm

shitt

[thorny gyro]

In physics do u always need to use the sinus

Or is it also possible that u need the COS or TOA

[stiff minnow]

Depends on what information you have, cos and tan can also be used

[thorny gyro]

This is sinus right

But when would it be COS or toa

[minor minnow]

mgsin =fx

mgcos=fy

probably

[unique karma]

thankyou 😄

[timber shard]

Hey, I need some bio help. Explain how the concepts of r and K selection relate to the intermediate disturbance hypothesis and diversity.

[floral lagoon]

Hello guys my name is sathvik and I joined the server today. I have a background in engineering(BE) now I decided t do physics for my higher education. can some one help to get started with GR and QM?

[keen coyote]

Stupid easy question, but help plsss

the charges i put for MN are positive 2 and 4 but it looks like negative sign in the picture for some reason

[cunning crescent]

You've written 2 too many electrons in the oxidation half reaction

[cunning crescent]

Not sure about the reduction, but i think it might be O3 + 2e- -> O2 + O^2-

[keen coyote]

Okay thank you so much!

I will check with the reduction

[safe zinc]

help?

[zenith steeple]

As per IUPAC nomenclature, the name of the complex [Co (H2O)4(NH3 )2]C13 is

(a) tetraaquadiaminecobalt (III) chloride

(b) tetraaquadiamminecobalt (III) chloride

(c) diaminetetraaquacobalt (III) chloride

(d) diamminetctraaquacobalt (III) chloride

[exotic current]

Hello guys, can someone explain me why SN1 reactions are usually followed by E1 reactions?

[keen vector]

There's no such rule that after every SN1 rxn E1 will occur
It only happens when we give heat along with the reagents and in some specific other reagents and reactant rxn
If heat is not applied then E1 will not take place and the rxn will stay upto SN1 mechanism only

[exotic current]

But if we add heat we favor E1 instead of SN1 right? And SN1 sometimes not occur or SN1 always occur if we have the conditions to?

[keen vector]

After the formation of H3O+ from H2O ..it aquires and extra positive charge in electron cloud so further protonation means adding of H+ will require immense amount of energy to cross activation barrier in the form of highly endothermic reaction
Now you will ask why NH4+ exist which is similar to H402+ then the answer is NH4+ is formed by protonation of NH3 which had no earlier positive charge on itself also after the formation of NH4+ it's further protonation is not possible (NH5+ will not form) the reason is same (Positivity and small size resulting in electronic repulsion)

[keen vector]

See if we are to perform only SN1 we will not add heat but if you have to perform E1 then only heat is added
Your question was why always SN1 follwed by E1 but there's no thumb rule that everytime SN1 will be followed by E1 it depends on conditions given

In terms of chemistry theoretically everything is possible but we look for practical results since activation energy, energy barriers are real which can't be neglected while formation of any compound also theoretically we can have as many as uncountable numbers of compounds if the vision is that
But there are some limitations that's why we study these characters and formation mechanisms 😁

You too buddy ☺️🤗

[compact scroll]

diamminetetraaquacobalt (III) chloride

[lone juniper]

Can someone tell me which one is going to be in series and which one in parallel?

[lone juniper]

Are they all in series?

[modest oracle]

Series = same current that enters and exits them (~=put one after the other)
Parallel = same voltage at their poles (~= put next to each other)

So here C1 and C2 are in series, and that's all

[thorny gyro]

c1 and c2 are in series and then the equivalent capacitor of those two is in series with c3

[thorny gyro]

wait no c3 is not in series

[lone juniper]

Ahh so what about C3? Nothing goes there

[lone juniper]

Wait m getting confused why nothing with C3

[thorny gyro]

because the equivalent capacitance of this system is c3 as the equivalent of c1 and c2 has zero potential difference cuz its connected to a conducting wire so a short circuit will happen over there

[lone juniper]

Ahhh so like sth like there won’t be a potential drop before C3 so it won’t flow through there? ummm I am not sure if I understood the short circuit part coz I haven’t covered that yet so like can u tell me under what circumstances does that happen..?and like so in the end it would be just C3 left?

[thorny gyro]

a short circuit is when there is no potential difference across a capacitor as u can see because its connected to a conduction wire .yes only c3 would be left

[lone juniper]

Ahhh k thanks sm!!😭

[modest oracle]

Not only C3 "would be left"
Actually, C3 AND the equivalent of C1 and C2 (reunited as a single capacitor) would be left

[thorny gyro]

I thought C1 / C2 Were in parallel and the equivalent parallel one in norton/ thevenin schem will be in series with C3

[thorny gyro]

So the re-united capacitor and the C3 can’t be in series ??

Its just a doubt

Correct me if am wrong

[hybrid rose]

C1&C2 would not have any charge , as P.d = 0 , we will take only C3

[modest oracle]

Nope, because the current that goes through C3 does not go through the reunited capacitors, but through the short-circuit (the mere wire)

Ping me if you need a drawing, because that must not be easy to get via text

[thorny gyro]

what does that mean

i have done igcse

are they a levels?

[keen kayak]

Yesss

[thorny gyro]

A levels?

[keen kayak]

A levels has two parts As and A2

[thorny gyro]

ohk

what help you need?

you should join cambridge igcse discord

/r igcse i guess

[keen kayak]

Ohh okayy I didn't know they have this here

[halcyon zephyr]

I'm studying for A2 too! I'm taking same subjects as you except for biology, I'm taking further maths instead

[hollow star]

Could somebody please help me? How do I name this molecule?

[formal pulsar]

Helloo, i need someone who understand Lewis acids and bases, because i don't understand anything, not even the bonds

[hybrid rose]

Umm.. 1-(1-bromo-1methylethyl) -4ethyl benzene

[austere goblet]

shoot

[formal pulsar]

how do i write the equations? not the shapes, just the equations because i'm so lost rn

to make the question more clear, How do i write the equation using the shapes?

[austere goblet]

well do you know how to draw a Lewis structure?

[formal pulsar]

i roughly taught myself a thing or 2 on youtube like an hour ago ;-;

[keen kayak]

Nicee for Physics and Chem I have started the first chap for both subjects (Circular Motion and Energetics ) I can help if you need it :-) Explaining topics helps me to remember anyways

[halcyon zephyr]

That would be nice! ^^

[hollow star]

Thank you so much

[keen kayak]

Feel free to DM me if you need help I'll try to explain.

[past dew]

What is salt made of?

[thorny gyro]

Nacl

[verbal flume]

can someone help me with this, i don't know how did my teacher can calculate 19 kj

[stiff minnow]

Anyone know of good peer reviewed articles related to wormholes

[cunning crescent]

Sum of deltaH of products - sum of delta H of reactants. And rememeber that there is 3 moles of FeO, so you have to multiply that number by 3

[verbal flume]

wow it's true , thank you so much 😲

[cyan prairie]

Plz hlp me with q 3. Sry for a silly doubt but I tried this q by using I= nAeVd .. And then realized that 10^24 electrons are present in 1 m length so shouldn't be there 10^48 electrons in 1 m^2... But they've simply solved by putting direct values..

[celest gorge]

n=number density = no of electrons per unit volume(m^3). area A is not provided to us. i guess instead of giving area A separately, they have given nA which would be in units no of electrons per metre.

[cyan prairie]

thankuh!!!! why I didn't realize it....

[thorny gyro]

Does transcription produce one of the three types of RNA?

[half imp]

transcription is DNA -> mRNA

[half imp]

chem help

pls n ty

[lone heron]

Lewis acids are the ones that accept electron-pairs and Lewis bases donate electron-pairs.
You can use Lewis Octet rule to identify which is electron deficient and which is electron rich.

So in the reaction - the electron rich species donates to electron deficient.

[polar cliff]

What is ATP??? (in Bio)

[lone heron]

Adenosine triphosphate

In layman terms, maybe it is often called Energy currency (source : 10th grade science NCERT book). It takes up energy from the breakdown of food that we eat and provides it to other metabolic processes to occur.

[polar cliff]

thankuuu

[lone heron]

Glad to help:))

[polar cliff]

oki

[native hatch]

Anyone who studies in Aakash class 12 med?
So,that we could rant about FT’s and AIATS!🥲

[frigid linden]

I am struggling to understand circuits and magnetism in Physics 2 for my university. Does anyone have any help resources?

[sonic bone]

Any know how to solve this?

i think, we need to wait a long time for answers

[stuck glade]

While I have no knowledge of chemistry as no one else is answering this I'm going to go out on a limb and say it's 2nd answer

Since the formula is exactly the same but it's 1/3'd of everything

And 10 to the power 1/3 is 3.33 so it makes sense I suppose

[sonic bone]

oh ok !

maybe

[cunning crescent]

So the guy who helped solve it might be right I haven't checked, but if you want to know how to solve it, you use the formula for the equilibrium constant: K = [C]^c[D]^d/[A]^a[B]^b for the reaction aA +bB = cC + dD

[sonic bone]

this means, i need to deal with, fractional exponents!!

i was just gonna try it that way!

[cunning crescent]

Good luck :)

[thorny gyro]

This relation will help you to solve those kind of problems

[sonic bone]

exactly what i needed, though!
helped me!

TY

[cunning crescent]

Oh dang that's the fkn formula didn't know it existed

[thorny gyro]

no problem

[sonic bone]

hehe, lol

[sonic bone]

All Halogens show a negative Valency, but our dear Hydrogen shows a positive Valency/Oxidation State

And rest all are the properties that H2 share with Halogens!
So your answer is The 2nd-Option

@thorny gyro

[thorny gyro]

THANK YOU

[thorny gyro]

im in allen!!

[rain talon]

hey i need help in calculating EQ weight of something'

take for example HCL

how do u calculate its EQ wt

ping me if u hv the answer

TY

[civic nebula]

Can somebody help me with this?
Ty

[native hatch]

There are plenty of ways.
Eg for acids eq weight = formula mass/ basicity
Here , basicity for hcl =1 ( capable of providing 1 H+)
Eq weight of hcl = 36.5/1 = 36.5
But, if hcl is reaction with some other species, we need to check the oxidation state change too.

[rain talon]

ohk tysm

[thorny gyro]

Kinda urgent plz help

[stuck folio]

helpp

[native hatch]

This reaction requires energy so it’s an endothermic reaction + the entropy of gases is greater than that of solids.
Here, the compound is changing from solid to gas so entropy increases.

[jade ether]

help?

[native hatch]

Do you know the answer? I’m not sure about my calculations!
If the answer matches, I’ll send the solution.

[jade ether]

43.2

[native hatch]

Hope, it helps.

[jade ether]

thank you so muchhh <33

[autumn sequoia]

Question 5 and 7

[orchid veldt]

You're in 12th grade?

[autumn sequoia]

Yea

[orchid veldt]

Me toooo

[sick dust]

7th one

[autumn sequoia]

I got that ans but the books ans is different

[autumn sequoia]

I am like 12+ coz I boards canceled...

[orchid veldt]

Ohhhh

Ya I just came to 12th

[autumn sequoia]

Oh

[sick dust]

Did you prepare for any competitive exam?

[autumn sequoia]

Jee ongoing

[sick dust]

Ohh okay

Btw I just entered 11th

[autumn sequoia]

If ur gonna prepare for jee

Study 11th seriously man

[sick dust]

Ya I'm aiming for JEE. How did u prepare in 11th?

[autumn sequoia]

Coaching

Physics is main

[sick dust]

That's my favourite

[autumn sequoia]

Do projectile gravitational and shm all of them

Plus entire syllabus ofc

[sick dust]

What books did u use?

[autumn sequoia]

Super simplified r.d Sharma and coaching books basically

[sick dust]

Didn't u use the famous HC Verma

[vagrant loom]

any help?

[vagrant loom]

1?

[civic nebula]

Sry the answer is 2nd option

[vagrant loom]

wdym is the answer 1 or not

[civic nebula]

No
Its the 2nd option

[vagrant loom]

yeah got it, calculation mistake

take out area under graph (which gives the displacement in a vt graph) at t=1.5

for graph 1 it would be 2.5m

and for graph 2 it is 1.25

subtract for distance between them and you get 1.25

i did this for all the increasing step times given and this is coming out to be the highest

[civic nebula]

Ookk

So it mean that I have to find out separation for every instant

And then find out highest separation?

[vagrant loom]

yup

[civic nebula]

Oki thanks💜

[floral lagoon]

Can someone solve and explain the 3rd problem (step by step). Please it's urgent

#science-help

[harsh oriole]

serious question but how do people pay attention to lectures? I can't help but zone out no matter how much i try (maybe because I have adhd). But does anyone have any tips. Does background music help?

[hybrid rose]

For 5th use d(u/v) = u'v-v'u/v² and use chain rule

[autumn sequoia]

K

[surreal needle]

Anyone know what it is?

And how to do it

[thorny gyro]

Can anybody help me with part d) pls?

[mint jetty]

The 3rd one as its contain the largest number of molecules

[thorny gyro]

Ok thank you so much ! X

[rose wing]

u have to explain be careful

[mint jetty]

yes my answer is too short

[rose wing]

nice👍

[thorn siren]

Number of particles=Avogadro's constant*moles

[thorny gyro]

Yep I understand it now thanks !

[thorny gyro]

Thank u !

[unborn oracle]

Hi can someone help me with Q1? Ping if you do and thanks in advance!

[thorny gyro]

@unborn oracle first of all you need to find moles of calcium carbonate which could be find by formula given mass / molar mass if u calculate it would be 10/100 as mass of calcium carbonate is 100. Then if u would write equation it would be CaCo3 + 2Hcl gives CaCl2 + CO2 so the stociometric coefficents are same so CO2 would be in same amount as that of CaCo3 . So the moles of CO2 would also be 10/100 which is 0.1 . then if u would apply the mole formula for CO2 then u could find the mass of CO2 produce as 0.1=M/44 as mass of CO2 is 44 then the mass of CO2 produce should be 4.4g . if u have any confusion left with this question feel free to ping me 🙂

[unborn oracle]

Ah alright thank you so much!!

[unborn oracle]

Hi can someone help me with Q2? Ping if you do and thanks in advance!!

[sand spade]

@unborn oracle

[unborn oracle]

Thank you so much!!

[unborn oracle]

Hi can someone help me with Q3 and 4? Ping if you do and thanks in advance!!

[hollow star]

How do I name this three structures?

[unborn oracle]

Hi can someone help me with Q3? Ping if you do and thanks in advance!!

[thorny gyro]

For e. ii. I got 2mil which I think it’s the answer. But idk if I can back it up by an explanation so the way I thought the q is prob not right even if I got the right answer. Someone care to help?

Oh don’t mind me I do get it now. Sorry and thank you

[cunning crescent]

Use the IUPAC naming system. I think they have a website with the names for different functional groups, and also the order of priority with numbers.

[cunning crescent]

Write the reaction of Cu reacting with O to create Copper(II)oxide, convert 159 g of CuO to moles, use this nr to find required amount of moles of Cu, and then convert this nr to grams.

Hope this helps, lmk if you need more help

[unborn oracle]

Ah alright thank you so much! I'll look into it after my break

[unborn oracle]

Hey I’m not too sure if my equation is correct or not

[cunning crescent]

Remember that oxygen usually means O2! So if you replace the O with 1/2 O2 it is correct

The most important thing for this assignment is the relationship between CuO and Cu though, so dw the rest of the assignment will be correct

[hybrid rose]

Hm , at t=infinite , optical rotation is 2° , means optical rotation of impurity is 2° , at t= 0 , optical rotation of A would be 80° , let the concentration of A be C at t= 0 & at t= 60 degree optical rotation of A would be 75° , now optical rotation = specific rotation × Concentration . Use K= 1/1hr ln [C/C'] and then find c/c" at t= 5hrs , and that would be the ratio of optical rotation too , find it

[unborn oracle]

Ah alright thank you!!

[hollow star]

Yeah I tried that and I have named B and C already but I just can't get the name of D. I know it's a ester but Idk how to name this kind of ester

[cunning crescent]

I assume the first part of the name would be the same as for B and C, but that it ends with benzoate

Methylbenzoate

[abstract scarab]

hi can someone pls help me im unsure what im getting wrong

[shell pebble]

you shouldn't have (lb/min) with 5.17 because it is just the weight and it's measured in just lb. Then min will cancel with min and you'll get the right answer (which will be numerically the same but with correct units)

[shell pebble]

what you can do is download Chemsketch (free version for personal use) or buy either ChemDoodle (I believe it's $15/mo.) or ChemDraw. If you create the structure in these programs, you can generate its IUPAC name and see where you were wrong or what have you missed

[shell pebble]

I really don't think that you have adhd, usually people just misinterpret this term. About lectures, maybe you just had too much of mental work (more than 6-8 hrs/day), and you need 1-2 days of break and then you will be able to concentrate. Of course, it can be something else, in this case I would try to start from listening 30 min of lecture, making 5 min break, and then repeat. After you get comfortable with that, increase the lecture time, for example, by 10 mins. I would also think if the reason is in the topic of the lecture, maybe you are simply not interested in it.

When you read a book, calm background music may help, but in case of lectures it is surely extra.

[hollow star]

Thank you so much. This will be a life savior 😂

[harsh oriole]

I have diagnosed adhd so personally i find it hard to pay attention to these lectures regardless of the amount of time i worked that day or my interest in the subject. I really like the idea of taking intervals. I can try that. I’ve experimented with music and it helps a bit but haven’t found a solution yet.

[thorny gyro]

Yo can anyone drop their notes or resources on quantum chemistry?

ya girl is struggling

[unborn oracle]

Hi can someone help me with Q4? Ping if you do and thanks in advance!!
Also I don't think it's necessary to know abt the rocket, so I didn't include another pic of it

[cunning crescent]

Is there any information about pressure and temperature in the rocket?

[unborn oracle]

Hmm hold on lemme look for the page

Just look at example 2

[cunning crescent]

Okay so important tidbit of information from this example: you assume 1 mole of Amy gas takes up 24 dm3. This means that what you need to find is nr of moles of hydrogen needed to create 1 mole of water, and then multiply this by 24dm3

[unborn oracle]

What's nr?

[cunning crescent]

So the answer to this exercise is 24 dm3

Number

[unborn oracle]

Ah alright

Aight I think I got it

Thank you so much!!

[cunning crescent]

Np👍

[shell pebble]

You can check Atkins' "Elements of Physical Chemistry" or "Physical Chemistry". Then you can also read McQuarrie's "Physical Chemistry. A molecular approach"

[thorny gyro]

yes i got the answer thanks!

[keen kayak]

for Q 5(a) I used Fc=mromega^2
NOTE:-Take 15.0cm as diameter
=0.06×0.075
×[(2π×20)÷60]^2
=0.0197N
why is the answer wrong ?? Correct answer is :- 0.039

Someone please help I can't figure it out😩

[halcyon zephyr]

why would you take 15cm as diameter? 15cm is the radius

[keen kayak]

The older edition Book has diameter as 15.cm and I took the radius but still it isn't matching

[halcyon zephyr]

the answer 0.039 would be obtained if you used 15cm as radius, is 0.039 the answer you got from the older edition or this book?

[keen kayak]

Ohhhhh okayyy I used the new edition book which is why it isn't matching

Thank you so much

[halcyon zephyr]

ahhh i see

you're welcome

[stark viper]

Can someone check this please

Is it correct?

[shell pebble]

yup, 100%

[stark viper]

Thank you

[hybrid rose]

Cyclopropanecarboxylicacid

We use Oicacid when C of COOH is included , otherwise carboxylic acid , yes we use carboxylic acid if attached to the ring , cycloalkane carboxylicacid

[thorny gyro]

tac gta ccg taa gct aaa gga ata ccg att

what is the sequence of nitrogenous bases in the mRNA formed from the previous dna segment?

pls, help me :/

[mental owl]

24 no pls help me :/

[urban cypress]

if the segment is of the coding strand, then just replace t with u. if it's of the template strand, then complementary base sequence, and replace t with u.

[unkempt cobalt]

Is there any way to study physics without reading fcking ton of pages? Help if you know

[urban cypress]

for frequency, use 𝜔/2𝜋, for speed you need to differentiate, & for wave length use 𝜆=velocity/frequency

[urban cypress]

id suggest solving questions/numericals

[unkempt cobalt]

From the book itself or it'd be better to find something on side?

[gentle spear]

no. of d-emissions per day from a mass of polonium initially equal to the 1 microgram 1s about 12

• 10, Assuming that one emission takes place per atom and that the approximate density of

polonium is 10 g em, estimate the number of atoms in 1 cm- of polonium.

can anyone answer this ?

[hybrid rose]

Umm I can't understand the question

Can you share the exact question or pic of it?

[stark knot]

someone has ever read the book "Some assembly required" from Neil Shubin?

I need some abstract of the chapter "Loaded Dice"

[urban cypress]

start maybe with the textbook exercises, then solve questions banks? there are a lot of online review exercises too

one method that helped me was doing the first 10 questions from the exercises in the back, then id go over the theory which i couldnt solve questions from, and then do the rest of the exercises

most of the concepts in physics are very interrelated, so it helps if you make connections on your own

[thorny gyro]

oh, thanks

❤️

[native hatch]

Can someone suggest me a good organic chemistry class 12th youtube channel? Or any online class? Doesn’t matter if it’s free or paid.

[unborn oracle]

Hi can someone explain to me how to get the number of moles of CaCO3 at Qci? Ping if you do and thanks in advance!!

[verbal flume]

i’m currently study for organicchem1 and i really recommend The Organic Chemistry Tutor

[slim hemlock]

Can someone help me

[elder rune]

Sorry english isnt my mother tongue but i hope my explanation is clear enough

[unborn oracle]

Ooo thank you!!

[native hatch]

Thank youuu

[mental owl]

can u pls help me on how to find speed i m getting wrong answer every time

[urban cypress]

you could straight up use the speed=freq*wavelength formula, otherwise usually you have to differentiate afaik

[flat merlin]

Halp

Everyone in my discord is stumped

[brave inlet]

for a) or b)

if its part a, use sum of horizontal forces=0 , sum of vertical forces =0. Form simulatenous equations and solve them to find T

[young fractal]

crash course is quite good for organic chem

[modest oracle]

By symmetry, q will always be in equilibrium

[hybrid rose]

System is in equilibrium means force on Q will be 0 too

[modest oracle]

Thus, you want the charges Q's to be static
=> Attraction force Qq (separated by distance d) = Repulsion force QQ (separated by 2d)

[hybrid rose]

-Q/4

[thorny gyro]

Can someone explain “Static friction” to me? I'm not able to understand it properly ;-;

[hearty venture]

@hadeeqa aejaz#5305 u can try physicswallah channel on YouTube or pankaj sir chemistry

[hybrid rose]

Friction force when the body is stationary

[modest oracle]

When you very slightly push horizontally an object on a table, it doesn't move. That means there is some horizontal force going against your slight push. That's a static friction

Basically, it is the force that prevents a body from going into movement

[thorny gyro]

Thank you!

[cyan prairie]

anyone? KVL( kirchoff's scnd law )is also known as? ( it's something related to force----

[noble willow]

@cyan prairie loop or voltage law

[cyan prairie]

it was something else n I forgot to note n recording of that cls isn't working🥲

[noble willow]

thats what its known as

[grim barn]

The four quantum numbers for the highest energy electron in an atom are:
n=4; {= 1; m = -1 and s (4) = + 1/2
The atomic number of the quoted atom is:
a) 31
b) 32
c) 33
d) 34
e) 35
help please guys

[cyan prairie]

okk btw thnx

[visual stratus]

Can someone help me with this problem? @me please

[robust shard]

Vietsub ntn

[cold trail]

yo
my teacher told that n=1 (K-shell) is called ground energy level
then L shell as first energy level
then M shell as second energy lvl and so on

So i was wondering that if an electron is in the L shell by default (atom is in ground state) so L shell will be ground energy level for this electron?
OR for this electron too the ground energy level will be K shell?

[hybrid rose]

31?

Electron is in 4p1 orbital , so it means it's electronic configuration is [Ar]4S²3d¹⁰4p¹ , so atomic number 31

[smoky wraith]

How do you guys memorize the periodic table?

[modest oracle]

Do you have to ?
I was never asked to remember it, but to be able to use correctly all the values it contains.

[leaden gate]

Hi is this the right place for computer science help

[ivory spade]

Yeah area under acc vs time graph gives the change in velocity

[ivory spade]

you ll get a couple of triangles and trapeziums in the graph and you ll just have to calculate the area then

[shell pebble]

I think you should go to #tech-related-help

[thorny gyro]

hi can anyone tell me why do nitrosamines give green red and blue color on reacting w sulphuric acid

[shell pebble]

you shouldn't memorize it, often periodic table is allowed for the use. However, yes, if you ask me some of the atomic numbers, masses, or something else I will probably be able to remember it but this is because I've looked at the table 1000 times and it stayed in my mind.

It's like with multiplication, what is 12*5?

I think in less than a second you knew that it's 60 but did you memorize the table with all the possible multiplications? No, you just multiplied 12 by 5 million times before and now you don't need a second to tell the answer.

[mental owl]

how to calculate the velocity of a sound in air if frequency , first and second Resonance positions are given ? basically formula to formula to calculate the velocity of sound in air (HELP PLS)

[ivory spade]

by the first and second resonance position you can get the wavelength

and then the speed would be wavelength x frequency

[thorny gyro]

Hi guys,is the charge of an electron not -1.6 x 10^-19? Why is it sometimes written without the - ?

[stiff minnow]

It's also the charge of the proton so maybe that's why?

[thorny gyro]

Ohhh

But when I work out for electrons,I use the negative ?

And if asked the charge of an electron I will say -1.6x 10^-19

?

[stiff minnow]

i'm pretty sure it's just a quantitive measure so if you're working out specific charge of an electron for example it wouldn't make a difference apart from the minus but it would still mean the same thing as far as i'm aware

[thorny gyro]

Oh okay then! Thank you for answering ❤️

[thorny gyro]

I have another Q lol
in a parallel circuit,is the ammeter : A1=A4=A2+A3?
If so,does it just mean that A1&4 is = to the sum of A2&3?

[stiff minnow]

A2 and A3 must be in parallel in this case so yes, the current in those should be equal to the current in A1 and A4 which would be in series

[raw dock]

Timmy - a productivity timer with social accountability

I built Timmy over a year ago  mostly for my own use, but I hope others find it useful:

https://timmytimer.com

It uses elements from the Pomodoro Technique combined with the social accountability of publicly stating what you're going to work on, and how you did when your timer stops. I know it personally helps me stay on track and get sh*t done.I

[thorny gyro]

Thank you 😭

Literally saving me today

[stiff minnow]

No probs 😁👌

[loud rivet]

How do I remember reactions and reagents 🥲

I always forget the reagents there are just so many of em 😭

[terse juniper]

make a list and stick it

keep revising it evryday...

after a week it will be in your head forever

[limpid summit]

⠀

[tired obsidian]

Does anyone know of a good slow motion camera app which would allow me to see the timestamp of each frame. I think it would be very useful for some of my physics experiments

[vernal walrus]

so im stuck on this

cant figure it out

pls hel

[sacred peak]

whats the use of a key in a circuit?

[small badge]

A key or a switch basically makes or breaks a circuit. When it is switched on,Current is able to flow through the circuit. So, there is a continuous flow of current when the key is 'on'. And, when the key is 'off' the circuit is 'broken' and there is no continuous current flow. Hope it helps!

[sacred peak]

ohh i thought switch and key were different things and got confused lol

thank u so much!

[small badge]

Well, in terms of looks it is different. A key is (well, a key) and it looks like that.

[sacred peak]

so they look different but have the same function?

[small badge]

But it almost has the same function of a switch in a circuit

switch is device that controls the flow of current in circuits. It is like a device that completes a circuit. like, if you want to switch on a fan then you need to switch 'on'.
A plug key has a base in which wires are connected. When the circuit is need to be on , then the wires are inserted between the base

[sacred peak]

alright got it, thanks 🙂

[small badge]

Sure you're welcome!

[smoky kernel]

Help

plzz

[thorny gyro]

they form a racemic mix as theyre enantiomers so if one rotates the mix in one direction the one rotates in the opposite direction, thus cancelling the overall rotation effect

[smoky kernel]

I didnt understand shit but thank you @thorny gyro

[thorny gyro]

guys can you recommend good textbooks about chemistry and biology?

[quiet reef]

and what grade do u read in?

[thorny gyro]

oh, I'm in the 8 grade

this year I began to study in the 9 grade

[quiet reef]

so i am from india ..idk much about books in europe but 'All in one Science' for class 8 is a popular book for students here

and idk much about books of lower grade..i dont remember which book i followed but i guess i read from our school textbook which is known as NCERT

[dusky kayak]

can you give me a detail answer for question 2 ?

please !

[tiny prawn]

Ooh hey why they don't give u the height of the building. Given details like these, i assume u have to calculate stuff (ex. potential energy ) in terms of the building's height@dusky kayak

[fringe dust]

@dusky kayak

[dusky kayak]

thank you very much ❤️

[loud rivet]

One of them rotates light in the clockwise direction and the other in anticlockwise direction and they finally cancel each other out

[hybrid rose]

What is the answer ? Option 1?

[wheat narwhal]

(If anyone has found a very tough problem/s on Mechanics (preferably rotational motion, etc), please DM me, i'm trying to collect)

[wheat narwhal]

the answer is ||g/7||

[native haven]

Please help in this question!!

[quiet reef]

put the resultant formula for vectors

[wheat narwhal]

any hint? 😦

[native haven]

@quiet reef thanks man

[stoic bramble]

Maybe you need to find if the block gains acceleration, bc it will be the thing that change the speed of the block in the end..

Starting setting the forces, like aways on those types of questions

[wheat narwhal]

well that's kinda obvious, the logic here is that the block will move in direction perpendicular to it's inital velocity, (as the kinetic friction will cancel out gravitational pull along the wedge), buut i'm not able to solve it's differential eqn, it's quite complex

[minor drum]

This problem is BEAUTIFUL! kkkkk

I have a guess, but I still didn't work out the math. Divide the problem in 3 axis, the plane has 2 axis, the axis "z" is the one of the initial velocity "V" and the axis "x" is perpendicular to "V" and parallel to the plane. The axis "y" is the normal of the plane.

The friction coeficient is super suspicious ... have you ever tried to deduce what's the coeficient to get a block sliding on constant speed? It's exactly that relation of tangent. Therefore if "V" was pointing downwards into the "x" axis, it would have constant velocity forever. Cool!

Soooooo, the magnitude of the friction force will be always equal to "Wx" (the projection of the weight on the "x" axis). If you didn't work out this math, you should 🙂

Now you have something super interesting, which is a friction vector rotating around the block that *always has magnitude |Wx| *

The way "Vz" decelerates is not uniform, because everytime it shrinks and the "Vx" increases, the friction shifts perfectly following the tendency of slippering (in other words, in the oposite direction of the whole velocity)

Was I clear? Did it help?
It's a start, I guess...

[cloud radish]

I will do chemistry homework (stoichiometric calculations) for money, I am a chemical technician and currently studying medicine

[distant barn]

Does anyone have a good resource for learning AP Physics C?

[wheat narwhal]

yep, i get it! thanks a lot. i did solve it

[vernal walrus]

is anyone

can help me

[thorny gyro]

help

[frail flame]

Its 3

I can feel it

[sand spade]

@thorny gyro Calculate the equivalent capacitance n then the voltage, now since they are in parallel the voltage remains the same so again use Q=CV n calculate charge on C3.

[thorny gyro]

AH i forgot to add the capacitances and i calculated voltage using only the 3 micro farad capacitor im so dumb🤡 okay thank you sm i got the answerrr

[thorny gyro]

yeah it is!!

[sand spade]

No problem

[young fractal]

this is the one i used personally - https://www.edx.org/course/on-ramp-to-ap-physics-c-mechanics , its quite good and if i remember correctly they also do provide reading and free text, i got a 5 , so ye highly recommend it.

[distant barn]

i think you meant to reply to me, so thank you very much

[tough crow]

Anyone knows DBMS?? I have this doubt from transaction and concurrency control that if dirty read is not present in the schedule then the schedule can directly be called Recoverable schedule or not?

[young fractal]

oh ye sorry bout that, hope it helps

[exotic current]

Hey, can someone help me align the reativity of that Diels Alder reactions pls

[hidden tundra]

heyy, does someone know how to do this exercise? :c (i translated it because it was in spanish)

[quartz zealot]

use the ideal gas law

[modest oracle]

Use pV = nRT

[hidden tundra]

oooh aight

[modest oracle]

p = pressure [Pa]
V = volume [m³]
n = n° of moles [mol]
R = 8,314 (thermodynamic constant)
T = temperature [K]

[hidden tundra]

thank you so muuuch 😄

[modest oracle]

Don't forget that # of molecules = n * NA,
NA being the avogadro number (6,022*10²² if I recall correctly, check that value before using it ^^)

[quartz zealot]

From Silberschatz et al.: Database System Concepts 7th ed.

A recoverable schedule is one where, for each pair of transactions T_i and T_j such that T_j reads a data item previously written by T_i , the commit operation of T_i appears before the commit operation of T_j.
Therefore if we can guarantee that no dirty reads take place in a schedule (which is an even stronger guarantee than the one in the definition), we can call the schedule recoverable

[formal dust]

i'm probably very late to this but it's actually 6,022*10^23 and not 22 (sorry for correcting u)

[tough crow]

Thank you so much 👍

[stark viper]

The output of A is C, right?

[modest oracle]

Thanks for correcting me ! ^^

[torn oracle]

guys, i need help with that , is there anyone know that?

[tough crow]

C is basically not of A, ie. A' so it will fill in order, 1,1,0,0, then we do C and B and hence the output will be 0,1,0,0

[stark viper]

thank you so much

[stray umbra]

Can anyone explain this part

[lone juniper]

It means after the hole in the barometer the hg in it would come in contact with the outer atmosphere hence the pressure outside..and since it comes in contact with it it relieves the pressure inside it and tries to become equal to the the atmospheric pressure ....eventually the pressure difference inside it and outside it would become zero there would be no pressure inside the barometer to hold it at the height it was earlier hence it will drop down...

[stray umbra]

Tysm 🥺,I thought the same but when the hole is made on the side of the barometer they said the mercury wouldn't come out as the atm pressure is much larger than the pressure inside

[native haven]

Please help me with this question!!!

[hybrid rose]

Force will be along v×B

[native haven]

OK thanks

Please help in this question!!!

[native haven]

Thanks man

[quiet reef]

you understand na that we ignored the 7 ohm resistor because the system represents a wheatsone bridge

[grim barn]

thank you

[native haven]

@quiet reef what is a wheatsone bridge

?

[quiet reef]

https://youtu.be/-gcBVaCIKhE

[native haven]

OK thanks alot man

[quiet reef]

👍

[ivory spade]

A B C D
0 0 1 0
0 1 1 1
1 0 0 0
1 1 0 1

[stark viper]

Can you explain how that output became 0101 pls

[grim barn]

The last electron distributed in the electron configuration of a neutral atom, in the ground state,
has the following set of quantum numbers: 5, 1, -1 and +1/2. Knowing that this atom
has a mass number equal to 128 and that, by convention, the first electron to occupy an orbital
has a quantum number of spin equal to -1/2, the number of neutrons in the nucleus of this
atom is:
a) 48.
b) 84.
c) 52.
d) 45.
e) 76
-help please guys -

[thorny gyro]

question no.6 help pls

[bitter stirrup]

Hello Anoushka, q 6 I will help you... Do you have time for solving this?

Actually it's midnight in India

[hybrid rose]

Ummm , I will tell you how to do it , the quantum numbers of last electron is given means all the lower energy level orbitals are completely filled , find the number of electrons , and as atom is neutral number of electrons = number of protons , number of neutrons would be = 128- number of protons

[bitter stirrup]

Hello Anoushka, q 6 I will help you... Do you have time for solving this?

[thorny gyro]

yesss

[grim barn]

thak youuuuu

[restive zenith]

how can I easily memorize acid and base indicators?

[civic nebula]

Abt : Electronic configuration
Can anybody tell me when we
Fill electron in 4s first than 3d second
And in 3d first then 4s second

I am confused when to fill 4s first and when to not
Ty

[hybrid rose]

We always fill 4s first as energy of 4s orbital is lower than 3d

There are some exceptions (atomic number 24 &29 ) one electron jumps from 4s to 3d orbital as energy difference is low + after jumping , atom is more stable

[civic nebula]

We fill 4s first in every case?
I mean in ions as well as elements ?

[hybrid rose]

For ions just fill same as neutral but remove electrons starting from 4S orbitals becuz we remove electrons from outermost shell first

@civic nebula

For eg Fe (26) = [Ar] 4s² 3d⁶ , Fe2+ would be [Ar]4s⁰ 3d⁶

[civic nebula]

Ok this is getting confusing😅 4s has less energy but still remains outer shell🙄 😆

[hybrid rose]

Having less energy and being outermost shell is different

[civic nebula]

But in 9th standard we learnt that outer shell has higher energy lvl

[hybrid rose]

I guess it is always true for bohrs atomic structure that outermost shell has more energy

[hybrid rose]

Only for mono electronic configuration

[civic nebula]

@hybrid rose yes thank you so much💜

[hybrid rose]

Np

[pulsar dragon]

Are you crying while solving?

[cunning crescent]

lmao no just dust on the camera lens

[cunning crescent]

ya it's from my camera. there's dust or something trapped on the inside of the glass so it's in all my pictures. usually not that visible thogh

[quiet reef]

Shit😂😂don't worry dude

Everything will be fine😂

[pulsar dragon]

Very funny

I thought you was really crying

[daring canyon]

Dear chat; I haven't been live here for quite some time. I have something to share with you all. As a Russian raised in the Netherlands, I've always felt drawn to how school was in the Soviet Union. According to most of the people I know, it was great. I couldn't find the right books, however. They were always very high level. And now finally, I have stumbled upon three Soviet-books on physics. These books are amazing, and will hopefully deepen your understanding of physics to a great degree. 🙂 Am I allowed to post three books here?

[pulsar dragon]

If you can post penis

Then you can post soviet books

[daring canyon]

I'm sorry, what?

[pulsar dragon]

Nvm

[daring canyon]

Please, explain. 😛

[pulsar dragon]

No

[daring canyon]

...

[pulsar dragon]

Just nvm

[daring canyon]

Alright... 🤔

+1 for Azumanga Daioh.

[daring canyon]

Word of warning: The introduction was forcefully written; it was pretty common to make references to 'great leaders'. The introduction therefore refers to Vladimir Ilyevich Lenin. Ignore the reference to communism, if you'd like. Personally, the reference to him wasn't too wrong (he was a philosopher, after all), I believe. Just warning. 😄 Furthermore, enjoy! Also, check for viruses just in case!

I wish you all good fun! ^_^ Enjoy! I also have a ton of chess books for those interested, not science related, ofc. I also have some earth-sciences books for those interested (I'm getting my BSc in Earth-Sciences in February, hopefully!).

There is also a second book, which has problems and answer to these books. 🙂 I do not have that one, currently. If needed, I'l look it up and provide the book. Just send me a PM. 🙂

[cunning crescent]

This was really sweet of you!

[cyan cairn]

guys, what formula can I use if I have Energy and I need the resultant of the forces?

[jolly inlet]

Explain it better

because variation in energy can be F*d

or the integral of force in respect to distance

but context is crucial

[stark viper]

why there are 8 possible binary values??