The temperature of the air in a valley begins to increase after the sun comes up and heats the valley floor. What will happen to the velocity of sound in this valley? -The velocity will increase -The veocity will decrease -The velocity will not change -The velocity will drop to zero.
I think it will increase a little bit ... just image ... if the temperature is 0, the velocity will be 0 too. because the vibration of atom is so weak and the sound cant progation.
