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Frequency of the piano key

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A 405 Hz tuning fork and a piano key are struck together, and no beats are heard. When a 402 Hz tuning fork and the same piano key are struck, three beats are heard. What is the frequency of the piano key?

  • 00 Hz
  • 402 Hz
  • 399 Hz
  • 405 Hz

Reference no: EM131085471

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