Calculate the change in potential energy of a body of mass 2kg that is lifted through a height of 10m above the ground level. if this 2kg mass is allowed to fall, what will be it kinetic energy before hitting the ground

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.