Question

tuning fork makes 30 720 vibrations in 2 minutes then the frequency of tuning fork is

Answer 1

n = 30, 720
t = 2 min = 120 sec

f = frequency = vibrations/sec=  30720/120 = 256 Hz

Answer 2

Hey there,

Frequency is the number of vibrations in 1 second.

30720 vibrations----120 seconds
30720/120 vibrations----1second

So the frequency is 256 Hertz.

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