Recent content by Lenoshka

  1. L

    Calculating the Radius of a Hot Air Balloon to Withstand a Load of 300 kg

    The result is supposed to be 12,2 m but every time I get 8,016 m... I used for example this formula >r=m/[(density of air-density of hot air)*(4/3)*pi] For density I used > rho=(p*M)/(R*T) Am I forgetting something? Thanks in advance.