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# Answer to Question #41540 in Mechanics | Relativity for Laimi

Question #41540
if there is a crest at x=3m at time t, find three other positions of the crest at that instant?
We will think that wave is started form point = 0 (because it doesnt say in what point it started).
If the crest is at x = 3m, that is point x =&frac14;. Thats why the period will be 12m.
So with the period 12m the crest will repeat.
Answer: So the first three is 15m, 27m and 39m.

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