An electron collides elastically with a stationary hydrogen atom. the mass of the hydrogen atom is 1837 times that of the electron. assume all motion is along a straight line. what is the ratio of the kinetic energy of the hydrogen atom after the collision to that of the of the electron before the collision?

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.