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A whistle of frequency 385 Hz rotates in ahorizontal circle of radius 50 cm at an angular speed of20 radians s -“1The lowest frequency heard by a listenera long distance away at rest with respect to the centre ofthe circle - given velocity of sound equal to 340 ms -“1 - is[2002]

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A whistle of frequency 385 Hz rotates in ahorizontal circle of radius 50 cm at an angular speed of20 radians s -“1The lowest frequency heard by a listenera long distance away at rest with respect to the centre ofthe circle - given velocity of sound equal to 340 ms -“1 - is[2002]






 
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