Which describes a sound wave?

A)A sound wave travels in a vacuum.
B)A sound wave is a longitudinal wave.
C)A sound wave is an electromagnetic wave.
D)A sound wave has one constant speed.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false

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.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.