Speed of a wave
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Pepe and Alfredo are resting on an offshore raft after a swim. They estimate that 3.0 m separates a trough and an adjacent crest of surface waves on the lake. They count 15 crests that pass by the raft in 19.5 s. Calculate how fast the waves are moving.
[I tried saying that frequency= 15/19.5=.769
V=f(3)
=(.769)(3)
=2.31 ] and that was wrong
Please advise me as to where my mistake is.
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