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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveDopler's effectMedium3 minQB

PhysicsMediumsingle choice

Passage / Comprehension

A car traveling at 25 m/s is approaching a stationary wall. Wind is blowing in a direction opposite to the car at 5 m/s. At an instant the car driver briefly blows the horn. He heard an echo exactly $\frac{11}{3}$ seconds after sounding the horn and notes that its frequency is 156 Hz. (Take speed of sound as 330 m/s.)

At what distance from the wall does the driver blow the horn?

Options:

Answer:

Solution:

$\frac{x}{325} + \frac{x - 25 \times \frac{11}{3}}{335} = \frac{11}{3} \Rightarrow x = 650$ m

Subject:PhysicsTopic:Sound WaveSubtopic:Dopler's effect

⏱ 3mℹ️ Source: QB

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