a$)$ A fluid is weighed in the lab. It is found that $2\mathrm{.}1$ U$.$S$.$ gallons of the fluid weighs $155\mathrm{.}2$ ounces. What is the fluid$$s density in kg$/$m$3?$

b$)$ A formula to estimate the volume rate of flow, Q$,$ flowing over a dam of length, B$,$ is given by the equation: Q $=3\mathrm{.}09$BH$^(3/2).$ Where H is the depth of the water above the top of the dam $($called the head$).$ This formula gives Q in ft $3/$s when B and H are in feet. Is the constant, $3\mathrm{.}09,$ dimensionless? Would this equation be valid if units other than feet and seconds were used?

c$)$ A tank contains $500$ kg of a liquid whose specific gravity is $2.$ Determine the volume of the liquid in the tank.