Question

If an object oscillates 40 times per second. It's frequency and time period will be :
(a)
0.66 Hz and 0.25 s
(b)
40 Hz and 0.25 s
(c)
40 Hz and 2.5 s
(d)
20 Hz and 25 s

Answer 1

sound is going to oscillate 40times per second so it's frequency is 40Hz.

time period=1/40=0.025s

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