Question

if a stone is thrown into water at distance of 6meters from the bank produces 12 crests of wave which took 10 minutes to reach the bank, what is the frequency of the wave

Answer 1

Each water wave have one crest. So there are 12 crests.

Diatance =6m

Wave length = distance /no of crests=6/12=1/2=0.5

Time = 10 min=10X60=600 seconds.

Speed of the wave =Distance/time=6/600=1/100=0.01 m/s

Frequency =speed/wave length=0.01/0.5=0.02 Hz