3 ms·
The helium in a balloon/dirigible is under pressure, so its density would be somewhat greater than 15% that of air. But point taken.
by titanomachy 12y ago
The helium in a balloon/dirigible is under pressure, so its density would be somewhat greater than 15% that of air. But point taken.
- coryrc 12y agoNo. It's always the same pressure as air. That's the point. It'll always be ~15%.