What is the electric force between a glass ball that has +2.5 x 10^-6 c of charge and a rubber ball that has -5.0 x 10^-6 c of charge when they are separated by a distance of 0.0050 m?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

What are similarities and differences between refraction, reflection, diffraction and absorption?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?