Question
A stone is dropped into a well of 80m deep. The sound of splash is heard 4.20 sec after the stone is dropped. Find the velocity of sound in air.
Answers
time to fall is from
80 = 4.9t^2
t = 4.04 s
time for sound to return: 4.20-4.04 = 0.16 s
80m/0.16s = 500m/s
80 = 4.9t^2
t = 4.04 s
time for sound to return: 4.20-4.04 = 0.16 s
80m/0.16s = 500m/s
The answer is not 500 it is 400