An inflatable balloon filled with helium is held on a string. Find the thread tension T if the mass of the ball shell is m = 2 g, volume V = 3 l, helium pressure p = 1.04 105 Pa, temperature t = 27°. Molar mass of helium μ = 4 g/mol, air density p = 1.3 kg/m3, universal constant K = 8.3 J/mol K.

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