Complete these sentences. if a bouncing ball has a total energy of 20 j and a kinetic energy of 5 j, the ball’s potential energy isj. if the kinetic energy of the ball decreases, then the potential energy will.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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.

How will the system respond to a temperature increase?