Full, because the helium is compressed. Compressed helium at a little more than 100 psi is about the same density as air at sea level. Small industrial cylinders of helium have 2200 psi.
Stuart Carlson
Full, because the helium is compressed. Compressed helium at a little more than 100 psi is about the same density as air at sea level. Small industrial cylinders of helium have 2200 psi.