What volume of helium is needed if a balloon is to lift a
What volume of helium is needed if a balloon is to lift a load of 180 kg (including the weight of the empty balloon)? the density of the air is 1.29 kg/m3 and the density of helium is 0.18 kg/m3?
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what volume of helium is needed if a balloon is to lift a load of 180 kg including the weight of the empty balloon the
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