# Physics

When a tuning fork of unknown frequency is sounded simultaneously with a 512 Hz tuning fork, 20 beats are heard in 4.0 seconds. What are the possible frequencies of the unknown tuning fork?

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1. F1 = 512 - 20/4 = 507 Hz.

F2 = 512 + 20/4 = 517 Hz.

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2. The column is at 60 cm in length. a)what is the wavelength of the sound wave produce by fork.

b)what is the frequency of fork if air temperature is 13.6 Centigrade.

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