Hello, We did a lab in class yesterday and we are expected to write a report and graph our results. The lab was a simulation of the Millikan oil drop experiment. We used graphing calculators to do the simulation and took down 15 results. One thing i dont understand is how to come up with the charge for any given value. 1. The problem statement, all variables and given/known data 2. Relevant equations q= (m g r) / V Where m = mass g = 9.8 r = distance OR plate seperation (i am not sure, i have 2 values that could be R) V = voltage The other equation he gave us was m = (4/3) Pi r^3 P pi = 3.14... r = radius P = density of oil I looked up the density of oil to be: vegetable oil (0.923 grams) per (cubic centimeter) = 923 kilograms per (cubic meter) 3. The attempt at a solution I tried some calculations i kept comming up with different values for M (which i think is the case since no two oil droplets would be the same mass. ) Yet the equation he gave us for calculating mass using the density confuses me since m is NOT going to be constant. I am required to: Show a sample calculation for determining the mass of the droplet and the charge on the droplet, along with the rest of my report. Can someone please help me make sense of this? Thank you.