empty container weighs $50lb,$ determine the specific weight,

mass density and specific gravity of this fluid.

A fish tank is $2ft$ long, $1ft$ wide and $1ft$ deep, and is filled with

water only. What are the pressure and the force at the bottom of

the tank?

The $3f{t}^3(2ft$ at the base, $2ft$ high and $1ft$ wide$)$ light fish tank

is filled with water, as shown in Fig. P$-1\mathrm{.}4.$ Find the pressure and

the hydrostatic force applied at the bottom. If the tank is placed

on a scale, compare the hydrostatic force at the bottom of the

tank with the weight on the scale and explain why the two forces

are different. What happened to the force difference?