An ultrasonic transmitter and receiver are placed 10.5 ft above the surface of a liquid. How long will the sound waves take to travel from the transmitter to the receiver? Assume the velocity of sound...

An ultrasonic transmitter and receiver are placed 10.5 ft above the surface of a liquid. How long will the sound waves take to travel from the transmitter to the receiver? Assume the velocity of sound waves is 340 m/s

If the liquid in Prob. 6.19 is lowered to 6.7 ft, what is the increase in time for the sound waves to go from the transmitter to the receiver?