#Can I cancel these out? If so Why
earnest kayak
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oak cliff
I'm actually not sure what you're trying to do here. The calculation you're performing has a dimension of inverse time.
Like, why are you dividing a speed by a length to begin with?
earnest kayak
I'm actually not sure what you're trying to do here. The calculation you're perf...
Do you see the m/s and m
oak cliff
Ah, right. Hertz.
earnest kayak
i red circled in paint
Like how can she jsut
cancel out the meters
they arent even aligned
oak cliff
"Aligned"?
earnest kayak
yes
like its not next to 3.00 x 10^8 m/s
its next to 490 nm
its alligned with 490 nm
oak cliff
...what does "alignment" mean in mathematical notation terms?
Like, I can just write anything next to anything, but in math, that should mean something specific.
earnest kayak
This whole thing
This
They are crossing each other
nm crosses nm
so they cancel each other out
isnt that how its supposed to be in math?
they are perfectly alligned making an X
So you are able to cancel them out
oak cliff
Okay, stop.
Write it in single-line notation.
That is, type what you think the expression is saying, using parentheses as necessary.
The whole expression.
earnest kayak
What
oak cliff
...order of operations...
oak cliff
You will see how when you type the expression out.
earnest kayak
what expression
oak cliff
This expression!
oak cliff
(3.00 x 10^8 m/s) / ((490 nm / 1) x (10^-9 m / 1 nm))
Yes. Now do order of operations.
earnest kayak
how can i do it when there is 10^-9 meter in there but 490 nm / 1 doesnt have any meters so you cant cancel them out
first step ok i cancelled out nanometers now there is still meter at 10^-9 that you cannot cancel or send anywhere
This is the order of operation i drew it and sent it before
you cancel out the nanometers and there is a meter left since 10^-9 m isnt next to 3.00 x 10^8 m/s you cannot cancel out the meters right?
oak cliff
(3.00 x 10^8 m/s) / ((490 nm / 1) x (10^-9 m / 1 nm))
Order of operations on this.
opal steppe
This is correct. 490 nm = 490*10^(-9) m. Or 4.9*10^(-7) m in standard form.
earnest kayak
This is correct. 490 nm = 490\*10^(-9) m. Or 4.9\*10^(-7) m in standard form.
Yea i know i was just confused about how you can cancel out the meter with the 3.00 x 10^8 m/s 's meter since i thought it wasnt possible