The waves are traveling at 3.75 m/s considering the distance between two crests to be 7.5 m.
Identify the known variables. In this problem, we have the time between two wave crests (2.0 s) and the distance between two crests (7.5 m).
Calculate the wave speed. To calculate the wave speed, we need to divide the distance between two crests by the time between them. This gives us the equation v = d/t.
Plugging in our known values, we get v = 7.5 m / 2.0 s = 3.75 m/s.
The waves are traveling at 3.75 m/s.
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