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Statement of a problem № 3538

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A tuning fork of frequency 300 c/s gives 2 beats/s with another fork of unknown frequency. On loading the unknown fork the beats increase to 5/s, while transferring the load to the fork of known frequency increases the num- ber of beats per second to 9. Calculate the frequency of the unknown fork (unloaded) assuming the load produces the same frequency change in each fork.

Solution:
A tuning fork of frequency 300 c/s gives 2 beats/s with another fork of unknown

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