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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 10 - Oscillation and Waves > Two cars A and B are moving away from each other in opposite directions. Both the cars are moving with a speed of 20ms^−1 with respect to the ground. If an observer in car A detects a frequency 2000 Hz of the sound coming from car B, what is the natural frequency of the sound source in car B? (Speed of sound in air =340 ms^−1)

Two cars A and B are moving away from each other in opposite directions. Both the cars are moving with a speed of 20ms^−1 with respect to the ground. If an observer in car A detects a frequency 2000 Hz of the sound coming from car B, what is the natural frequency of the sound source in car B? (Speed of sound in air =340 ms^−1)

and is cut into n equal parts If a spring has time period T then the time period of each part will be: