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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 16 - Waves and Acoustics > A source of sound of frequency f1 is placed on the ground. A detector placed at a height is released from rest on this source. The observed frequency f(Hz) is plotted against time t(sec) . The speed of sound in air is 300m/s. Find f1 (g=10m/s^2).

A source of sound of frequency f1 is placed on the ground. A detector placed at a height is released from rest on this source. The observed frequency f(Hz) is plotted against time t(sec) . The speed of sound in air is 300m/s. Find f1 (g=10m/s^2).

A stationary observer receives a sound of frequency = 2000Hz. The variation of apparent frequency and time is shown in figure. Find the speed of source if velocity of sound is = 300m/s