h=2*сигма/p*g*R R=2*сигма/p*g*h=2*21*10^-3/710*10*0,02=0,3*10^-3 м
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h=2*сигма/p*g*R R=2*сигма/p*g*h=2*21*10^-3/710*10*0,02=0,3*10^-3 м