Physics question? how deep is water?
Sound moves in steel at 5500 m/s and in salt water at 1430 m/s. A diver hits a rock on a steel cable and observes a 1 second delay between return time for the sounds traveling in the cable and the water itself. How deep is the water?
Please help me. Thanks in advance.
- QuarkLv 69 years agoFavorite Answer
Assume, the deep of the water = X
----> the distance covered the wave sound ( in the steel) : X = V *t ------> X = 5500 * t
----> the distance covered the wave sound ( in the water) : X = V *t ------> X =1430 * ( t + 1)
5500 * t = 1430 * ( t + 1)
550 t = 143 t + 143
( 550 - 143) t = 143
t = 143/407 = 0.35 sec
---> The deep of the water : X = V * t = 5500 * 0.35 = 1925 m
- 9 years ago
Could you tell us where is the location of the diver? Is he at the steel cable or on the water surface?