# Homework Help: Ship and Iceberg - Speed of sound question

1. Feb 26, 2012

### fchen720

1. The problem statement, all variables and given/known data

17.While cruising the North Atlantic in a fog, a ship blew its horn, and received an echo from an iceberg 4.0 s later. The temperature of the air was 5°C, the temperature of the iceberg was 0°C, and the temperature of the water was 2°C In order to calculate the distance from the ship to the iceberg, the captain must also know the speed of sound in:

A.
ice at 0°C.
B.
water at 2°C.
C.
water at 0°C.
D.
air at 0°C.
E.
air at 5°C.

2. Relevant equations

n/a

3. The attempt at a solution

If there were no fog the answer would definitely be E, but since there is a significant
amount of water in the air I thought the answer was B.

Turns out the water doesn't make a difference because the answer sheet says E.

2. Feb 26, 2012

### Andrew Mason

Water content has some effect on the speed of sound in air so to be perfectly accurate you should have the speed of sound in saturated air at 5° C. But I expect it is not much different than the speed of sound in dry air at the same temperature.

AM

3. Feb 26, 2012

### Astronuc

Staff Emeritus
The sound is traveling through what medium? What is the temperature of that medium?

4. Feb 26, 2012

### DaveC426913

While foggy air certainly contains more water than dry air, I think you'll agree it doesn't have anywhere close to as much water in it as the sea.

5. Feb 26, 2012