A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is `25 %` more than the actual frequency. If the speed of sound is `v`, that of the source is

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is of three times the original frequency. The velocity of sound is v m / sec . The speed of source will be

When a source of sound moves towards a stationary observer the pitch of sound will appear to

When a source of sound is in motion towards a stationary observer, the effect observed is

A source is approaching a stationary observer with uniform acceleration . The frequency of the sound heard by the observer appears to -

The apparent frequency of the sound, heard by a listener is less than the actual frequency of sound emitted by a source. In ths case

If apparent change in frequency of sound heard by a listener is less than, the actual frequency of sound emitted by source. Then it means that

A source of sound is moving towards a high wall with a speed of 20 m/s. The frequency of the sound produced by the source is 400 Hz. If the speed of the sound is 340 m/s, then the beat frequency heard by a person standing near the wall will be

An observer moving towards a stationary source observes that the apparent frequency is three times the actual frequency of the source. If the velocity of sound is V, the velocity of the observer would be-