A tuning fork with a frequency of 320.0 Hz and a tuning fork of unknown frequency produce beats with a frequency of 4.5 Hz. If the frequency of the 320.0-Hz fork is lowered slightly by placing a bit of putty on one of its tines, the new beat frequency is 7.5 Hz. (a) Which tuning fork has the lower frequency? Explain, (b) What is the final frequency of the 320.0-Hz tuning fork? (c) What is the frequency of the other tuning fork?
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