# Depth and pressure in a submarine

1. Jan 31, 2016

### BubblesAreUs

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

As a submarine dives, the pressure on its hull..

a. remains constant
b. increases
c. depends on the decrease in volume of the submarine
d . decreases
e. depends on the thickeness of the walls of the submarine
2. Relevant equations

P = F / A
3. The attempt at a solution

Not a.

Not c. since the volume remains constant. Ballasts are simply used to allow in water in order to dive...

Not d. Pressure increases as one goes deeper.

I think the answer is either b or e. The pressure on the hull does increase but that is compensated by increasing the thickness of the hull....

2. Jan 31, 2016

### Nidum

The thickness of the hull only determines it's strength ie the pressure it will withstand before imploding . Therefore correct answer to you problem is ?

3. Jan 31, 2016

### BubblesAreUs

Yes that makes sense. Thus the pressure on the hull increases as the submarine dives. Correct?

4. Jan 31, 2016

### Nidum

That is correct .