. The speed of sound in air is 300 m/s. How long would it take for the sound of a clap to echo back to you if you are standing at one end of a 15m long room?
a. 0.05 sec
b. 0.1 sec
c. 10 sec
d. 20 sec
The time taken by sound to echo back to you can be calculated as:
t= total distance / speed of sound
t= 2*provided distance/speed of sound
t=2*(15m)/(300m/s)
t=0.1 sec
Thus correct option is (b).
. The speed of sound in air is 300 m/s. How long would it take for...