Question

I'm having trouble cancelling out my units.
\[(N \cdot \cancel{m^2}/\cancel{C^2)}\left[\frac{\cancel{C}}{\cancel{m}^2}+\frac{\cancel{C}}{\cancel{m}^2}\right]\]
I've N left, but I should have N/C

Answer 1

\[N \cdot \cancel{m^2}/\cancel{C^2)}\left[\frac{\cancel{C}}{\cancel{m}^2}+\frac{\cancel{C}}{\cancel{m}^2}\right]\]

Answer 2

Just reposting the question :)

Answer 3

@phi

Answer 4

nevermind I think I see my mistake, C^2 doesn't cancel out C

Answer 5

Very nice. You solved your own problem by yourself.

Answer 6

But where is 2 in the numerator?

Answer 7

2 in the numerator?

Answer 8

m^2

Answer 9

\(\frac{C}{m^2}+\frac{C}{m^2}=\frac{2C}{m^2}\)

Answer 10

The m's are different, I can't add them.
\[8.99\times10^9N\cdot m^2/C^2\left[\frac{(-5\times10^{-6}C)}{(0.11m)^2}+\frac{(5\times10^-6C)}{(0.09m)^2}\right]\]

Answer 11

I just needed to cancel my units out to make sure I'm doing the calculations correctly, because the answer is supposed to be in N/C

Answer 12

\[\vec{E}=N/C\]

Answer 13

Ah, i understood, that is ok.