How do relate the density of the body and the fluid when it is fully or partially submerged?

Every body partially or totally submerged in a fluid experiences an upward force called thrust. The thrust on the body equals the weight of the displaced fluid.
The thrust on a body depends on the density of the fluid and the volume of the immersed body E = PFluído • g V immersed in addition, the density of the fluid P = (mass fluid / fluid volume).

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How do relate the density of the body and the fluid when it is fully or partially submerged?

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