Question

sound wave a is moving through a medium that is decreasing in temperature. sound wave b is moving from a liquid to a gas medium. which statement can be made about both waves? they will speed up. they will increase the density of their medium. they will slow down. they will decrease the density of their medium.

Explanation:

Step1: Recall sound - speed in mediums

The speed of sound in a medium is directly proportional to the temperature of the medium for a given medium. As the temperature of the medium through which Sound Wave A is moving decreases, the speed of Sound Wave A will slow down.

Step2: Recall sound - speed in different states

The speed of sound is faster in liquids than in gases. When Sound Wave B moves from a liquid to a gas medium, its speed will slow down.

Answer:

They will slow down.