Collapse depth $($or crush depth$)$ is the submerged depth that a submarine can't exceed without

collapsing due to the surrounding water pressure. The collapse depth of modern submarines is

not quite a kilometer $(750$ m $).$ Assuming sea water to be incompressible $($S$.$G$.=1\mathrm{.}03),$ what is

the crush depth pressure in $\frac{N}{m^2}$ and $(l\frac{b}{i}{n}^2).$ Is the pressure you computed absolute or

gage pressure?