In 1909, Robert Millikan performed an experiment involving tiny, charged drops o

Question

In 1909, Robert Millikan performed an experiment involving tiny, charged drops of oil. The drops were charged because they had picked up extra electrons. Millikan was able to measure the charge on each drop in coulombs. Here is an example of what his data may have looked like.

A single electron has a charge of 5.3×1015 Z . Using zeets and a fictitious unit of mass called the wiggle, w, the charge-to-mass ratio of an electron is 9.2×106 Z/w . What is the mass of an electron in wiggles?

Explanation / Answer

charge / mass = 9.2*10^6
(5.3*10^-15) / mass = 9.2*10^6
mass = 5.76*10^-22 w

Answer: 5.76*10^-22 w

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