Question

Can u help me find this answer?
1)Velocity of sound in the atmosphere of a planet is 500ms^-1.The minimum distance between the source and sound and the obstate to hear the echo,should be
a)17m
b)20m
c)25m
d)50m​

Answer 1

Answer:

Explanation:

Given,

Speed of sound = 500m/s

Therefore the distance transversed by sound wave in one second = 500m

So, the distnace transversed by the sound wave in 1/10 sec =50.0m

Since the sound wave has to travel the distance between source nd reflector twice to produce echo. So the minimum distance between source nd reflector required to produce echo = 50.0/2 = 25m