A man is standing between two vertical walls 680 m apart. He claps his hands and hearts two distinct echoes after 0.9 seconds and 1.1 second respectively. What is the speed of sound in the air
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Answer:
Let speed of sound be v
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The speed of sound in air is 441.93 m/s.
Explanation:
Given that,
Distance = 680 m
let the man is at a distance x from the first cliff and then he is at ( 685 - x) m from second cliff .
Now look the distance traveled by the wave to reach the man in 0.9 second will have to travel 2 x distance from first cliff and also true for second cliff .
We need to calculate the velocity
Using formula of distance
....(I)
....(II)
From equation (I) and (II)
We need to calculate the speed of sound in air
Using equation (I)
Put the value into the formula
Hence, The speed of sound in air is 441.93 m/s.
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Topic : speed of sound
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