SOLUTION: A ship using sound-sensing devices above and below water recorded a surface explosion 39 seconds sooner on its underwater device than on its above-water device. If sound travels in

Question 352113: A ship using sound-sensing devices above and below water recorded a surface explosion 39 seconds sooner on its underwater device than on its above-water device. If sound travels in air at about 1,100 feet per second and in water at about 5,000 feet per second, how har away was the explosion?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A ship using sound-sensing devices above and below water recorded a surface
explosion 39 seconds sooner on its underwater device than on its above-water
device.
If sound travels in air at about 1,100 feet per second and in water at about
5,000 feet per second, how far away was the explosion?
:
let d = distance to the explosion
:
Write a time equation: time = dist/speed
:
- = 39
Multiply equation by 55000, to clear the denominators, results
50d - 11d = 55000(39)
39d = 55000(39)
divide both sides by 39
d = 55000 ft
:
:
Check solution by finding the actual times
- =
50 - 11 = 39
RELATED QUESTIONS
A ship using sound-sensing devices above and below water recorded a surface explosion 39... (answered by Paul)

Sound travels through seawater 4.62 times as fast as through air. The sound of an... (answered by josgarithmetic)

Two recording devices are set 2400 feet apart, with the device at point A to the west of... (answered by lynnlo)

Two recording devices are set 2600 feet apart, with the device at point A to the west of... (answered by Theo)

Person in A(8,0) and B(8,10) hear the sound of explosion right at the same time. While... (answered by Theo)

HI I NEED HELP ON A PROBLEM THAT WORKING WITH SUBTRACTING REAL NUMBER..HERE THE... (answered by )

Peter is standing on a bridge and throws a stone up into the air at 30 m/s. The stone... (answered by KMST)

The following application was developed during World War II. It shows how the properties... (answered by CPhill)

A rock is thrown upward from a bridge into a river below. The function f(t)=-16t^2+38t+90 (answered by Boreal)