Suppose a ball had a potential energy of 5 j when you dropped it. what would be it’s kinetic energy just as it hit the ground?

Are aliens real? justify you’re answer.

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.