A tuning fork of unknown frequency produces P 4 beats per second when sounded with another W. t...

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A tuning fork of unknown frequency produces
P 4 beats per second when sounded with another

W. tuning fork of frequency \( 254 \mathrm{~Hz} \). It gives the same number of beats per second when unknown tuning fork loaded with wax. The unknown frequency before loading with wax is
(1) 258
(2) 254
(3) 250
- (4) Can't be determined
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