Solved: A small drop of water is suspended motionless in
Chapter 18, Problem 19.90(choose chapter or problem)
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8480 N/C. The mass of the water drop is 3.50 109 kg. (a) Is the excess charge on the water drop positive or negative? Why? (b) How many excess electrons or protons reside on the drop? 6
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