The magnitude of electrostatic between two point charges separated by a distance r is f

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.