The diagram shows a stationary wave on a string at two instants of maximum vertical displacement.
The frequency of the wave is 12 Hz.
What is the speed of the wave?
1 )
$3.6m{s^{ - 1}}$
$7.2m{s^{ - 1}}$
3 )
$360m{s^{ - 1}}$
4 )
$720m{s^{ - 1}}$
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