//Example 3-11 Weight loss of an Object in Seawater
rho_seawater = 1025 //density of seawater [kg/m^3]
V = 0.4 * 0.4 * 3 //volume of block [m^3]
rho_block = 2300 //density of block [kg/m^3]
g = 9.81 //gravitational acceleration [m/s^2]