viewquestions/11995/A student is performing the experiment of Resonance Column The diameter of the column tube is 4 cm The frequency of the tuning fork is 512 Hz The air temperature is 38C in which the speed of sound is 336 ms The zero of the meter scale coincides with the top end of the Resonance Column tube When the first resonance occurs the reading of the water level in the column is jee main 2012

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A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren heard by the car driver is - jee main 2012 physics

 (A) 8.50 kHz 
(B) 8.25 kHz 
(C) 7.75 kHz 
(D) 7.50 kHz


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