Physics, 24.12.2019 07:31 guadalupemarlene2001

(a) how much helium (density 0.18 kg/m3) is needed to lift a balloon carrying two people, if the total mass of people, basket, and balloon (but not gas) is 280 kg?
(b) repeat for a hot-air balloon whose air density is 10% less than that of the surrounding atmosphere.

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(a) how much helium (density 0.18 kg/m3) is needed to lift a balloon carrying two people, if the tot...