5. Sound (Physics) MHT CET 2022

A sound carried by air from a sitar to a listener is a wave of following type.

When sound waves travel from air to water, which of these remains constant ?

The Laplace’s correction in the expression for velocity of sound given by Newton is needed because sound waves

Speed of sound is maximum in

The speed of sound in air is 330 m/s and that in glass is 4500 m/s. What is the ratio of the wavelength of sound of a given frequency in the two media?

Consider a closed box of rigid walls so that the density of the air inside it is constant. On heating, the pressure of this enclosed air is increased from P0 toP. It is now observed that sound travels 1.5 times faster than at pressure P0 calculate P/P0

A man shouts loudly close to a high wall. He hears an echo. If the man is at 40 m from the wall, how long after the shout will the echo be heard ? (speed of sound in air= 330 m/s)

Intensity of its sound varies inversely with ____ of the distance

A rocket is moving at a speed of 220 m/s towards a stationary target. It emits a wave of frequency 1200 Hz. Some of the sound reaching the target gets reflected back to the rocket as an echo. Calculate  The frequency
of sound detected by the target

Dopplers effect in sound takes place when source and observer are

A certain sound wave in air has a speed 340 m/s and wavelength 1.7 m for this wave, calculate the frequency

A certain sound wave in air has a speed 340 m/s and wavelength 1.7 m for this wave, calculate the period.

A tuning fork of frequency 170 Hz produces sound waves of wavelength 2m. Calculate speed of sound

An echo-sounder in a fishing boat receives an echo from a shoal of fish 0.45 s after it was sent. If the speed of
sound in water is 1500 m/s, how deep is the shoal?

A girl stands 170 m away from a high wall and claps her hands at a steady rate so that each clap coincides with the echo of the one before,  If she makes 60 claps in 1 minute, what value should be the speed of sound in air?

Sound wave A has period 0.015 s, sound wave B has period 0.025. Which sound has greater frequency?

At what temperature will the speed of sound in air be 1.75 times its speed at N.T.P?

A man standing between 2 parallel eliffs fires a gun. He hearns two echos one after 3 seconds and other after 5 seconds. The separation between the two cliffs is 1360 m, what is the speed of sound?

A police car travels towards a stationary observer at a speed of 15 m/s. The siren on the car emits a sound of frequency 250 Hz. Calculate the recorded frequency. The speed of sound is 340 m/s

The sound emitted from the siren of an ambulance has frequency of 1500 Hz. The speed of sound is 340 m/s. Calculate the difference in frequencies heard by a stationary observer if the ambulance initially travels towards and then away from the observer at a speed of 30 m/s.

A man is at a distance of 6m behind a bus. The bus begins to move with a constant acceleration of 3 m/s². In order to catch the bus the minimum speed with which the man should run towards the bus is

If the magnitude of sum of two vectors is equal to magnitude of difference of two vectors, the angle between these two vectors is

A man stands at a distance’d’ m behind a bus which moves forward with a constant acceleration ‘a’. He starts running at a constant speed ‘v’ m/s. The minimum speed of the passenger so that he can catch the bus is

Which of the following remains constant if a body travels with constant acceleration?