The label has been scratched off a tuning fork and you need to know its frequency. from its size, you suspect that it is somewhere around 250 hz. you find a 250-hz tuning fork and a 270-hz tuning fork. when you strike the 250-hz fork and the fork of unknown frequency, a beat frequency of 5 hz is produced. when you strike the unknown with the 270-hz fork, the beat frequency is 15 hz. what is the unknown frequency?
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