What is the force between two 1.0 X 10^-5 C charges separated by 2.0 m?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

What causes the development of most clouds and precipitation in the atmosphere?