How much does a litre helium cost and how much can a litre helium lift?
Answer:
a lot. like really a lot. like about $2. and it´s hard to get and comes in big amounts (like 50l compressed bottle for $600).
helium has a density 0.178 kg/m3. depending on temperature, altitude and air moisture, as long as u keep the combined density of the helium and what u want to lift below say 1.2 kg/m3, it will be lifted.
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