A spherical droplet of water a good conductor has a mass of, Ask an Expert

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A spherical droplet of water (a good conductor) has a mass of 1.00 x 10^-6 grams and a radius of 62.0 micrometers. Initially it is uncharged. Then, 25.0 million electrons are removed from it.

1. If two such droplets having equal but opposite charges are separted center-tocenter by 1.00m, what is the magnitude of the electric force between them?

The voltage drop along a 30.0m segment of a power line made from copper wire (a very good conductor) is 1.2V, while carrying a current of 25.0 A.

1. What is the resistance of this wire segment?

2. How large is the electric field along the wire?

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