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Feb12-07, 01:37 PM
P: 9
Quote Quote by berkeman View Post
You can use units to be sure you get the right answer.

3.2 [uC] / 1.6x10^-19 [C/e-] = ?

Be sure to remember that 1uC = 10-6C
Thanks that helped some, and ive been trying to backwards work the equation. Based on the test questions the answer is 2.0x10^13

The only way I can obtain that actuall answer is to make the equation.

3.2x10^-6 / 1.6x10^19 = 2.0x10^13

Is this pure chance or is there some step im not quite geting that allows for the units to change from positive to negative?