posted by srikar .
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.