The frequency of sound is 200 Hz. What does it mean? Please help me​

The metric unit of electrical power is the watt volt ampere ohm

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

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.