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cindy!

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## Homework Statement

hello, our task was to go on to this site http://www.wcsyearbooks.com/millikan/experiment.html and then figure out the charge and the number of excess electrons on the oil drop using 5 electric fields.

Electric field: 2.7x10^4, 3.1x10^4, 3.6x10^4, 4.0x10^4 and 5.2x10^4

m=1.0 x10-15 kg

g is -9.8 m/s2.

## Homework Equations

for charge: q=mg/E

found that q= 3.63x10^-19, 3.16x10^-19, 2.73x10^-19, 2.45x10^-19 and 31.89x10^-19

for number of excess electrons: N=q/e

found that e= 2.27e, 1.97e, 1.7e, 1.53e and 1.18e

however this does not seem right but is is just simple calculations with most of the data given to me...

## The Attempt at a Solution

i sort of did it up there i just didnt show the esact calcualtions because it is simple math but the thing i don't understand is whether or not the drops have an integer of excess electrons..if it did wouldn't N be a whole number?

thanks for any help.

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