To prepare for work in zero gravity, astronauts on Earth train in a hydro-pool. Do cosmonauts really experience a state of weightlessness while in the water?
No, since the surface forces, which are the forces of Archimedes, remain. However, the uniform distribution of these forces over the surface of the astronaut’s body leads to a decrease in local deformations of the body, which creates the illusion of a decrease in weight.
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