question_answer

Two cars A and B are moving away from each other in opposite directions. Both the cars are moving with a speed of 20 \[m{{s}^{-1}}\] 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 (in Hz) of the sound source in car B? (speed of sound in air\[=340m{{s}^{-1}}\])

Answer:

2250