two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period

two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period
  • A.
    0.5s
  • B.
    1.0s
  • C.
    1.2s
  • D.
    2.0s
Correct Answer: Option A
Explanation

(f_1 – f_2 = frac{1}{T})
12 – 10 = (frac{1}{2})
= 0.5

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