what is the amount of pressure exerted by a book that weights 12N onto a desk if it is laid on its longest side and has dimensiona of 0.25m x 0.20m x 0.02m?

May someone explain how to do this question?

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

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