Velocities of three persons A,B,C and sound source S are shown in diagram.Frequency of sound source is 600 Hz and sound speed is 325m/sec.At given situation, which of the following options is / are correct :

Two sources S_1 and S_2 of same frequency f emits sound. The sources are moving as shown with speed u each. A stationary observer hears that sound. The beat frequency is ( v= velocity sound)

Two sound sources of frequency 9Hz and 11Hz are sounded together then which plot is correct after superposition of sound waves.

Two sound sources of frequency 9Hz and 11Hz are sounded together then which plot is correct after superposition of sound waves.

Two sound sources of frequency 9Hz and 11Hz are sounded together then which plot is correct after superposition of sound waves.

A source of sound is travelling with a velocity of 30(m)/(s) towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20(m)/(s) in a direction at 60^@C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound is 340(m)/(s) )

A source of sound is travelling with a velocity of 30(m)/(s) towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20(m)/(s) in a direction at 60^@C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound is 340(m)/(s) )

The source (S) of sound is moving constant velocity v_(0) as shown in diagram. An observer O listens to the sound emmited by the source. The observed frequency of the sound

The source (S) of sound is moving constant velocity v_(0) as shown in diagram. An observer O listens to the sound emmited by the source. The observed frequency of the sound