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 velocity 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. so.when the temp inc ,the velocity inc too.
