Calculate the frequency in hertz, for the following cyclic event.
45 revolutions of a turntable in one minute.

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Solution

Step 1: Given data,
Number of revolutions(oscillations) =45
Time = 1 minute = 60 seconds
Step 2: Formulas Required,
Frequency (f)= $\frac{n u m b e r o f o s c i l l a t i o n s}{t i m e}$
Step 3: Calculation for finding frequency,
Here total numbers of oscillations =45
Total time =60 seconds
Frequency (f)= $\frac{n u m b e r o f o s c i l l a t i o n s}{t i m e}$
f = $\frac{45 o s c i l l a t i o n s}{60 s e c o n d s}$
f= $0.75 H e r t z$
Hence, the frequency for 45 revolutions in 60 seconds in a turntable is $0.75 H e r t z$ .

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