Question

The frequencies of four sound wave are given below. Which of these sound waves can be

            used to measure the depth of sea?

                                (a) 15000 Hz.                                      (b) 10 K Hz.

                                (c) 50 K Hz.                                          (d) 10000 Hz.

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Answer 1

Answer:

15000 Hz is the sound wave that use to measure deapth of sea.