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period of wave : Using v=fλ, we obtain
f=
3.2m
240m/s
=75Hz
since frequency is the reciprocal of the period, we find
T=
f
1
=
75Hz
1
=0.0133s≈13ms
frequency : Using v=fλ, we obtain
f=
3.2m
240m/s
=75Hz
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