Where is the center of gravity of a 12-inch ruler? explain why this phenomenon occurs

Explain what happens at the saturation point when adding salt to water at room temperature.

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

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.