# physics

1.)A rock at the blank of a coast is struck by water waves.find the frequency of the waves striking the rock,if the distance between two consecutive crests or troughs is 100m.velocity of water wave is 150m/sec.

2.)the timeperiod of a vibrating body is 0.1sec.the waves produced by the body moves with a speed of 330m/s.find the wavelength of the wave.

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1. λ = v /f ,
1) f= v/λ =150/100 = 1.5 Hz

2) λ = v•T =330•0.1 = 33 m

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posted by Elena
2. λ = v /f .
1) f= v/λ =150/100 = 1.5 Hz

2) λ = v•T =330•0.1 = 33 m

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posted by Elena

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