Question

[Numbers change] In the early 1900s, Robert Millikan discovered the peculiar property that charge came in little packets, no smaller than e = 1.602 x 10^-19 C - he had measured the charge of the electron. Here's (roughly) how he did it: He removed an electron from an initially neutral droplet of oil with a diameter of 0.8 um. In a vacuum, he positioned the droplet between two metallic plates separated by 5 mm and fiddled with the potential (voltage) across the plates until the droplet would hover against the force of gravity: Droplets of this size with +e charge would hover, but only for a particular voltage (otherwise they would sink or rise). Given the parameters stated here, and the fact that the density of the oil was 933 kg/m^3, what was the voltage that made the droplets hover? (Give your answer with 0.1 V precision)

          [Numbers change] In the early 1900s, Robert Millikan discovered the peculiar property that charge came in little packets, no smaller than e = 1.602 x 10^-19 C - he had measured the charge of the electron. Here's (roughly) how he did it: He removed an electron from an initially neutral droplet of oil with a diameter of 0.8 um. In a vacuum, he positioned the droplet between two metallic plates separated by 5 mm and fiddled with the potential (voltage) across the plates until the droplet would hover against the force of gravity: Droplets of this size with +e charge would hover, but only for a particular voltage (otherwise they would sink or rise). Given the parameters stated here, and the fact that the density of the oil was 933 kg/m^3, what was the voltage that made the droplets hover? (Give your answer with 0.1 V precision)

Added by Samuel T.

Question

Please give Ace some feedback