1.

A police car horn emits a sound at a frequency 240 Hz, when the car is at rest. If the speed of the sound is 330 m/s the frequency heard by an observer who is approching the car at a speed of 11 m/s isA. 248 HzB. 244 HzC. 240 HzD. 230 Hz

Answer» Correct Answer - A


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