Sound Test - 72...

The wavelength of sound from a tuning fork of frequency 330 Hz is nearly. Use speed of sound in air as 330 m/s

A person has the audible range from $$20 Hz$$ to $$20\times 10^3Hz$$. Find the wavelength range corresponding to these frequencies. Take velocity sound as $$340m/s$$

A person can hear a sound of maximum frequency $$20,000 Hz$$, If the speed of sound in air is 344 $$ms^{-1}$$  the wavelength is : 

An echo is returned in $$3\ s$$. If the speed of sound is $$342\ m/s$$, then the distance between the source of sound and the reflecting body is:

An  echo is heard only, if the sound after reflection should reach the ear after: 

A person can hear a sound of maximum frequency 20,000 Hz. If the speed of sound in air is 344 $${ ms }^{ -1 },$$ the wavelength of this maximum frequency sound is : 

A sound signal is simultaneously sent in air and water from a boat on a river. The echo of sound sent back by the river bed is heard in $$4s$$, while the echo sent back by the aeroplane is heard in $$8s$$. Find the distance between aeroplane and river bed.

A stone is dropped in a well which is 19.6m deep. Echo sound is heard after 2.06 sec (after dropping) then the velocity of sound is

The echo of a gunshot is heard after $$5\ s$$. Find the distance of the obstacle. Speed of sound is $$320\ m{s^{ - 1}}.$$

A man fires a gun and hears the echo after $$2\,\frac{1}{2}sec$$. If the velocity of sound in air is $$340ms^{-1}$$ his distance from the cliff causing the echo is