Question

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The velocity of waves in a ripple tank of a particular depth of water is 20 centimeters per second, and standing waves are produced with nodes spaced 2.0 centimeters apart. What is the frequency of the wave generator?

f = _____ Hz

a)10.
B)5.0
c)80.
d)40.

Answer 1

in a standing wave, spacing between consequetive nodes is a half wavelength, hence
\[\lambda/2 = 2\]
now, \[v = \nu * \lambda\]
\[\nu=v/\lambda\]
= 20/4 = 5hz

Answer 2

Thanks for the help:)

Answer 3

you're welcome :)