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## Homework Statement

a research submarine has a 20 cm diameter window 8 cm think. the manufacturer says the window van withstand forces up to 1x10

^{6}N. What is the submarine's maximum safe depth?

## Homework Equations

p = p

_{o}+ [tex]\rho[/tex]gd

## The Attempt at a Solution

p = F/A = 1X10

^{6}/ 0.03 = 3.2x10

^{7}Pa

so now do i use p = p

_{o}+ [tex]\rho[/tex]gd ??

but if i do what would be my [tex]\rho[/tex]?

[tex]\rho[/tex] = m/v = m/[tex]\pi[/tex]r

^{2}h

how would i find mass?

thanks in advance for help!