A whistle producing sound waves of frequencies 9500 ~Hz and above is approaching a stationary person with speed v ~ms ⁻¹ . The velocity of sound in air is 300 ~ms ⁻¹ . If the person can hear frequencies upto a maximum of 10,000 ~Hz , the ma

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A whistle producing sound waves of frequencies 9500 ~Hz and above is approaching a stationary person with speed v ~ms ⁻¹ . The velocity of sound in air is 300 ~ms ⁻¹ . If the person can hear frequencies upto a maximum of 10,000 ~Hz , the maximum value of v upto which he can hear the whistle is

Quantrex Academy · Accepted Answer

Correct answer: D. 15 ~ms ⁻¹

f_ a p p = f(300) 300-v v=15 ~m / s

A whistle producing sound waves of frequencies 9500 ~Hz and above is approaching a stationary person with speed v ~ms ⁻¹ . The velocity of sound in air is 300 ~ms ⁻¹ . If the person can hear frequencies upto a maximum of 10,000 ~Hz , the maximum value of v upto which he can hear the whistle is

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