Question 106: Waves

Question

A set of 20 tuning forks is arranged in a series of increasing frequencies. If each fork gives 4 beats with respect to the preceding fork and the frequency of the last fork is twice the frequency of the first, then the frequency of last fork is _________ Hz.

Accepted Answer

Given $${v_{20}} = 2{v_1}$$
Also $${v_{20}} = 4 	imes 19 + {v_1}$$
So $${v_{20}} = 152\,Hz$$

Waves

A set of 20 tuning forks is arranged in a series of increasing frequencies. If each fork gives 4 beats with respect to the preceding fork and the frequency of the last fork is twice the frequency of the first, then the frequency of last fork is _________ Hz.

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