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Infrasonic Sound

A stationary ...

Question

A stationary rail engine produces whistle with a frequency 2600 Hz. A person standing at a distance of 550 m from engine will listen ___________ no. of waves within one minute.

A

26 x 10⁴

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B

26 x 10⁵

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C

156 x 10³

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D

156 x 10⁵

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Solution

The correct option is C
156 x 10³

ν = 2600 Hz

Frequency means no. of waves emitted per second.

No. of waves = 2600 x 60 = 156000 = 156 x 10³

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