# Simple Static Pressure problem, need help with units

## Homework Statement

Hi i'm having trouble solving this physics problem if anyone can help it would be greatly appreciated !

Static pressure problem: A bathtub contains water to a depth of 20 inches. Determine the pressure at the bottom of the bathtub in both [psia] and [psig] (a being absolute pressure and g being gauge pressure)

im using P=pgh

## The Attempt at a Solution

what i've tried doing was to find gauge pressure first: P=pgh=(1.94slug/ft^3)(32.2ft/s^2)(1.67ft). I got the 1.67 feet from converting 20 inches to feet. the answer i get is 104.11slug/s^2 but they want it in psi or lb/in^2 and i am having trouble converting these units =[

Related Introductory Physics Homework Help News on Phys.org
Why don't you just convert the initial 20 inches to meters then solve for the standard SI units?

Well the problem is that i don't know how to get rid of the /s^2 in my final answer and even if i use the standard SI units ill still come up with an answer that has /s^2

That's the acceleration…s^2 is an SI unit.

Also…

look at the definition of what a pound actually is (in terms of units). That should fix things.

SteamKing
Staff Emeritus