Quote:
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Originally Posted by Radical Edward
the density of helium is
0.1786 g/L
and air is
1.2 g/L
so the difference is about 1g/l.
work out the mass of the thing you want to lift in grams, and then you need about that many litres of (pure) helium - you also have to include the container of course in the mass calculations, since you need tp pick that up too..
I did this while drunk, picking up wine glasses with party balloons - though admittedly the helium was probably not very pure. it took a suprisingly large number, actually.
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that's cheap glasses for you