Final answer:
When submerged in water, the buoyant force supports a percentage of the body's weight. This percentage depends on the relative densities of the body and the water.
Step-by-step explanation:
When submerged in chest deep water, the buoyant force acting on the body helps to support a portion of the body's weight. The percentage of the body's weight that remains supported depends on the relative densities of the body and the water.
This can be calculated using Archimedes' principle, which states that the upward buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.
Therefore, to determine the percentage of the body's weight supported, one could compare the weight of the water displaced by the body to the body's actual weight.