A ship sends a pulse of ultrasound down…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A ship sends a pulse of ultrasound down. The echo from the sea floor comes back after . How deep is the sea? (Speed of sound in sea water )
Need a reminder? The key ideaShow
An echo travels to the reflector and back: . A separate echo needs at least (a wall at least away in air). SONAR uses ultrasound in sea water, about .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
Step 1. .
Answer: .
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