Tag: determination of speed of sound by echo
Questions Related to determination of speed of sound by echo
An observer heard his echo $2.5$ seconds after he produced the sound by standing before a wall $400$ m away from him. The speed of sound in air is ____ m/s
If d is the distance between the source of sound and reflector $t _1, t _2$ are times at which echoes are heard, the expression for determination of velocity of sound in air by echo method is :
A man stands at a distance of $250m$ from a cliff. He fires a gun and heard the echo after $1.5$ second . What will be the velocity of the second?
A man stands at a distance of $225 m$ from a cliff. He fires a gun and heard the echo after $1.5 sec$. What will be the velocity of the sound?
An echo returns in 30 s. What is the distance of the reflecting surface from the source?
A man standing in front of a large wall claps at a regular frequency of $10Hz$. He finds that the echoes coincide with his clapping. (The speed od sound in air is $330ms^{-1}.)$
(i) Time taken between successive clapping is $0.1s$.
(ii) The distance between the man and the wall, after he clapping, If he hears one more echo is $33m$.
(iii) The distance between the man and the wall, after he stops clapping, if he hears four more echoes is $66m$.
A man fires a shot and hears an echo from a cliff after $2sec$. He walks $85m$ towards the cliff and the seconds shot is now heard after $1.5sec$. What is the distance o the man from the cliff when the first echo was heard.
A boy clapped his hands near a cliff and heard the echo after 4s. What is the distance of the cliff from the person if the speed of the sound, v is taken as 346 ms$^{-1}$?
A sound wave of wavelength $\lambda$ travels towards the right horizontally with a velocity V. It strikes and reflects from a vertical plane surface, travelling at a speed v towards the left. The number of positive crests striking during a time interval of three seconds on the wall is :
A person is in front of a fort wall. The person can hear an echo of sound produced by him when minimum distance between person and wall is 16.75 m. The velocity of sound in air is:
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