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Message: <blockquote data-quote="Rob" data-source="post: 2248288" data-attributes="member: 215576">...helium gas. Its maximum....? A blimp is cruising slowly at low altitude, filled as usual with helium gas. Its maximum useful payload, including crew and cargo, is 1.21E+3 kg. The volume of the helium-filled interior space is 4.13E+3 m3. The density of helium gas is 0.16 kg/m3, and the density of hydrogen is 0.081 kg/m3. How much more payload could the blimp carry if you replaced the helium with hydrogen?__________</blockquote>