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Question 27

A survey boat uses an echo sounder to measure the depth of water in a harbour.

First, the crew find the speed of sound in the harbour water. An underwater microphone is placed 14.8 m from the sounder, and a pulse from the sounder reaches the microphone 10.0 ms after it is sent.

The sounder then sends a pulse straight down. The echo from the seabed is detected 25.0 ms after the pulse is sent.

Calculate the depth of the seabed below the sounder.

[3]
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4 Waves Questions

  1. GCSE
  2. /Physics
  3. /4 Waves

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