A tuning fork T produces 4 beats per second with a source ′S′. On loading wax on T, it gives 5 beats per second with the same source. When the source ′S′ moves towards a fixed wall with a speed 5 m/s then again T gives 5 beats per second with echo of the source. If speed of sound is 340 m/s, then frequency of the tuning fork, before loading wax, is

A tuning fork T produces 4 beats per second with a source ′S′. On

1.	A tuning fork T produces 4 beats per second with a source ′S′. On loading wax on T, it gives 5 beats per second with the same source. When the source ′S′ moves towards a fixed wall with a speed 5 m/s then again T gives 5 beats per second with echo of the source. If speed of sound is 340 m/s, then frequency of the tuning fork, before loading wax, is
Answer» A tuning fork $T$ produces 4 beats per second with a source $^{'} S^{'}$ . On loading wax on $T$ , it gives $5$ beats per second with the same source. When the source $^{'} S^{'}$ moves towards a fixed wall with a speed $5 m/s$ then again $T$ gives $5$ beats per second with echo of the source. If speed of sound is $340 m/s$ , then frequency of the tuning fork, before loading wax, is

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