At a height of ten meters above the surface of a freshwater lake, a sound pulse...
At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. The echo from the bottom of the lake returns to the point of origin 0.112 s later. The air and water temperatures are 20 oC. How deep is the lake?
Homework Answers
Solution :-
height above water = x
depth of water = y
t = 2x/v_air + 2y/v_water
.112 = 20/343 + 2y/1482
y = 39.78 m
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