How to show by experience that a buoyant force acts on a body in a gas?

Take a small balloon and fill it with helium. If you place this ball in a flask with water, then it will float, since the force of Archimedes (buoyancy force) will act on it.
If we take the ball in our hands and release it, it will take off, since the force of Archimedes (buoyancy force) will act on it.



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