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Using Sonar to calculate the Length of the ocean floor....?
A ship surveying the ocean bottom sends sonar waves straight down into the seawater from the surface. The first reflection off the mud at the sea floor is received 1.74 seconds after it was sent. The second reflection, from the bedrock beneath the mud returns after 2.36 seconds. How deep is the water? How thick is the mud?
The distance is the speed of the wave times the time of travel.
D to mud = speed x 1.74 seconds
D to bedrock = speed x 2.36 seconds.
Thickness of mud is the difference between the two.
Thickness = speed x (2.36-1.74) = speed x .62 seconds.
Use the formulas above to get your answer, once you have the speed of the sonar wave. I don't see it in the problem you posted. As long as your speed is in units per second the answer will be in the same units (i.e. speed in meters/second, will give you meters for your answer.)
Have fun!
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