What is the gravitational potential energy of a soccer ball that is coming down if it has a mass of 0.35 kg and is coming down from a height of 7 meters

A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision

Why there is no inductive reactance in dc circuits

What is a possible result of higher air temperature caused by global warming