"the gravity of the sun causes the planets to move in a circular path" which law is this ?

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?