A fish finder uses a sonar device that sends 20,000-Hz sound pulses downward from the bottom of the boat, and then detects echoes. Part A If

Question

A fish finder uses a sonar device that sends 20,000-Hz sound pulses downward from the bottom of the boat, and then detects echoes. Part A If the maximum depth for which it is designed to work is 230 m , what is the minimum time between pulses (in fresh water)

in progress 0
Cherry 6 months 2021-07-27T08:23:37+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-07-27T08:25:16+00:00

    Answer:  The minimum time between pulses (in fresh water)

    = 0.3106 s

    Explanation:

    To calculate the speed of echoes sounds, we will use

    Speed = 2x/t

    Where x = distance and t = total time.

    Please note that:

    sound travels at 343 m/s in air. But it travels at 1,481 m/s in water (almost 4.3 times as fast as in air); 

    Total distance = 2 × 230 = 460m

    Using speed of sound in water

    1481 = 460/t

    t = 460/1481

    t = 0.3106

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )