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Chawker
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Homework Statement
You intend to suspend water droplets in mid-air to understand rainfall.
You give the droplets a small positive charge, and keep them suspended by an electric field upwards.
The experiment consists of two horizontal metal plates, separated by 9.3m. The water droplets have a mass of 2.8 * 10^-9 kg and have a charge of 6.4*10^-10 C
What voltage should you supply to keep them hovering?
Homework Equations
V = E/d
E=kq/r^2[/B]
The Attempt at a Solution
Kind of lost on this one. I thought about using e=kq/r^2 with the given information then substituting it into the first equation however that still doesn't include the mass component of the question, even if its needed at all.
How should i go about this problem?
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