Question

6 a) A sound wave in a fresh water lake takes 4 s to
return to the surface of the lake. How deep is the
lake at that point?

Answer 1

Answer:

d=2962 m= 2,962 km

Explanation:

s=2*d, d is the depth

t=4 s

vH2O= 1481 m/s

d=?

s=vH2O*t

s=1481 m/s*4 s

s=5924 m

yields

d=s/2

d=2962 m= 2,962 km