These tasks: Vsh (volume of the considered balloon) = 300 m3.
Reference data: ρv (air density at a temperature of 20 ºС) = 1.204 kg / m3; g (acceleration due to gravity) = 9.81 m / s2.
The buoyancy force of the air, which acts on the considered balloon, can be determined by the formula: Fa = ρw * g * Vsh.
Calculation: Fa = 1.204 * 9.81 * 300 = 3543.372 N.
Answer: The buoyant force of the air is 3543.372 N (the lifting force of the air will be zero).
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