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what are the units of cm divided by a cm-1

Loop hoop

what would happen would it be just -1

Reply 1

alow

Unparseable latex formula:

\dfrac{x}{x^{-1}} = x(x^{-1})^{-1} = \dddot

Reply 2

GGYSM

It would be a cm^2 because you're dividing cm by 1/cm, which is just cm x cm.

Reply 3

ChaoticButterfly

Original post by GGYSM

It would be a cm^2 because you're dividing cm by 1/cm, which is just cm x cm.

This is the right answer OP

Original post by alow

Unparseable latex formula:

\dfrac{x}{x^{-1}} = x(x^{-1})^{-1} = \dddot

That gives 1/x^2 which is wrong

Reply 4

Pangol

Original post by ChaoticButterfly

Unparseable latex formula:

\dfrac{x}{x^{-1}} = x(x^{-1})^{-1} = \dddot

That gives 1/x^2 which is wrong

Really? Surely the last part comes to x, so then multiplying it by the first part gives x^2. It looks like it gives the same answer as the one which you have identified as correct.

Reply 5

ChaoticButterfly

Original post by Pangol

Really? Surely the last part comes to x, so then multiplying it by the first part gives x^2. It looks like it gives the same answer as the one which you have identified as correct.

I did it on some paper

Yep you are right.... I've spent to long out in the real world and my algebra has gone to **** :-/

I added the two -1 powers instead of multiplying. Although even then I still got the wrong answer doing that lol, should have been 1/x. Would have got zero marks for my working out.

(edited 6 years ago)

Reply 6

Pangol

Original post by ChaoticButterfly

I did it on some paper

Yep you are right.... I've spent to long out in the real world and my algebra has gone to **** :-/

I added the two -1 powers instead of multiplying. Although even then I still the wrong answer doing that lol, should have been 1/x

Hey, happens to us all from time to time...

Reply 7

Loop hoop

wait so whats the answer :s-smilie:

Reply 8

Pangol

Original post by Loop hoop

wait so whats the answer :s-smilie:

Original post by GGYSM

It would be a cm^2 because you're dividing cm by 1/cm, which is just cm x cm.

Reply 9

GGYSM

Original post by Loop hoop

wait so whats the answer :s-smilie:

cm^2 (centimeter squared)

Reply 10

ChemistryWebsite

Is your question pertaining to spectroscopy? Infra red spectroscopy maybe?

The x axis of the spectrum is wavenumber, i.e. the number of waves per unit length. Usually this is measured in the unit cm-1, the reciprocal of the wavelength of the IR radiation being used.