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 Form 2 Physics Wave 1 Video Questions and Answers

A ship in an ocean sends out an ultra sound whose echo is received after 3 seconds. If the wavelength of the ultra sound in water is 7.5 cm, and the frequency of the transmitter is 20 kHz, determine the depth of the ocean. (3 marks) (KCSE 2015 paper 2 question 9).

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