The answer is 1.267 Hz.
76 beat per minute is in fact the frequency of the oscillation.
COnverting it into SI unit , i.e. , beats per second or Hertz.
[tex]\begin{aligned}76 b p m &=\frac{76}{60} b p s \\&=1.267 \mathrm{~Hz} .\end{aligned}[/tex]
What is frequency?
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