Find the buoyancy of a 200 cm ^ 3 balloon. Air density 1.3 kg / m ^ 3.

In this case, the buoyancy force is the force of Archimedes, since the force of Archimedes acts on a body immersed in both water and air.
Then the force of Archimedes Fа = p * g * V = 1.3 * 10 * 0.0002 = 0.0026N

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