# Scuba diver and pressure in air tank

1. Mar 30, 2008

### chrozer

How would you go by solving this problem? I tried dimensional analysis but I got stuck.

2. Mar 30, 2008

### LtStorm

The equation you can use is;

P$$_{1}$$V$$_{1}$$ = P$$_{2}$$V$$_{2}$$

Just rearrange it to solve for P$$_{2}$$, which is what you want to know.

Then you just have to figure out how many liters of air the diver will breathe in that hour. It tells you the volume of each breath, and how many breaths he'll take (breaths per minute times sixty minutes). So that'll give you the V$$_{1}$$ that he needs, whereas the V$$_{2}$$ is the volume of the tank.

And I still don't know why the Latex codes are displaying those numbers as superscripts rather than subscripts....

3. Mar 31, 2008

### chemisttree

Like this?

4. Mar 31, 2008

### LtStorm

Yeah, like that, I need to consult the instructions for using Latex apparently.

Edit: Feh, of course I just now realized what I'd done wrong.

Last edited: Mar 31, 2008