A person is standing still and listening to a siren sounding an alarm. The frequency of the sound is 500 Hz. The person begins running toward the sound at a rate of 20 m/s. The frequency of the sound the person hears will

Question

Michelle Mclean

Physics

13 January, 00:42

A person is standing still and listening to a siren sounding an alarm. The frequency of the sound is 500 Hz. The person begins running toward the sound at a rate of 20 m/s. The frequency of the sound the person hears will

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Arias · Answer 1

This item can be answered through the concept of Doppler effect. The Doppler formula is,

f2 = ((v + vo) / (v - vs)) f

where f2 is the new frequency, v is the speed of the sound waves, vo is the velocity of the observer, vs is velocity of source of sound, and f is original frequency.

f2 = ((343 + 20) / (343 - 0)) (500 Hz)

f2 = 529.15 Hz