Practice Book for MHT-CET Physics (Waves and Thermodynamics)>Chapter 5 - Waves>TOPICWISE QUESTIONS>Q 88

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A siren emitting sound of frequency $800 Hz$ is going away from a static listener with a speed of $30 m / s .$ Frequency of sound that will be heard by the listener is (Velocity of sound $= 330 m / s$ ),

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Important Questions on Waves

MEDIUM

MHT-CET

IMPORTANT

Practice Book for MHT-CET Physics (Waves and Thermodynamics)>Chapter 5 - Waves>TOPICWISE QUESTIONS>Q 89

A bus is moving with a velocity of

5 m s^{- 1}

towards a huge wall. The driver sounds a horn of frequency

165 Hz

. If the speed of sound in air is

335 m s^{- 1}

, then the number of beats heard by a passenger on the bus will be (Speed of sound

= 335 m s^{- 1}

)