Question

The height of a cloud about the earth is 100m if an observer hears the sound of a thunder 0.3s after the lightening is seen ,what is the velocity of Sound on that rainy day .

Answer 1

Just apply the formula, that is given in the above picture.

Answer 2

Answer:

The velocity of Sound on that rainy day is approximately 333.33m/s.

Explanation:

Given:

Height of the cloud = 100m

Speed of the light  = $3*10^8m/s$

Time taken by light of lightening to reach down,

=   $\frac{distance}{speed} = \frac{100m}{3*10^8m/s} = 0.33*10^{-8}sec$

Time taken by sound of thunder to reach down = $(0.3+0.33*10^{-8} )sec$

This is approximately = $0.3sec$

Therefore, speed of the sound  =  $\frac{distance}{time} = \frac{100}{0.3}$

speed of the sound  = 333.33m/s  (approx.)

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