Answer to Question #294974 in Physics for zia

Question

1. A deep sea ocean vessel uses SONAR to detect the ocean's bottom. Sound waves are emitted from the surface of the ocean and travel through the water at 1450 m/s. The ocean bottom is 1630 m below the surface. Determine the amount of time that passes before the sound waves are reflected back to the surface.

A.   1.12 s                                                                        C. 0.89 s

B.    2.25 s                                                                        D. 1.78 s 

Answer 1

Given:

$v=1450\:\rm m/s$

$d=1630\:\rm m$

The amount of time that passes before the sound waves are reflected back to the surface

$$t=2*\frac{d}{v}=2*\frac{1630\;\rm m}{1450\:\rm m/s}=2.25\:\rm s$$

Answer: B.    2.25 s