User talk:Ziss69

Hallo This is the first time that I use this Page and I don't really know how it works. But I try just to ask my question and hope to get an Answer.

Is compressed Air or gas heavier than non-compressed air If yes under which perssure can reach which wheight with differed gases (for accemble air and helium)and how much do I need for the resaults.

Thanks in advance