What is the value of the buoyancy force acting on a 4 m3 bathysphere completely submerged in the sea?

Any body in a liquid will be affected by the buoyancy force of Archimedes, equal to:
Fa = ρ * g * V, where ρ is the density of salt water (ρ = 1030 kg / m ^ 3), g is the acceleration of gravity (we take g = 10 m / s ^ 2), V is the volume of the submerged part of the bathysphere (V = 4 m ^ 3).
Let’s calculate the value of the Archimedes force:
Fa = ρ * g * V = 1030 * 10 * 4 = 41200 N = 41.2 kN.
Answer. The Archimedes force acting on the bathysphere is 41.2 kN.