2007-11-06 18:38:00 · 9 answers · asked by wezjamizon 1 in Science & Mathematics ➔ Physics
Within the atmosphere, filling the barrel with anything less dense than air - helium, hydrogen, or vacuum - will make the barrel lighter. In the absence of air pressure to provide buoyancy, the only thing you can put in the barrel to lighten it is a hole.
2007-11-06 20:23:15 · answer #1 · answered by injanier 7 · 0⤊ 0⤋
An anti-barrel, thereby annihilating the barrel entirely, leaving it with no mass/weight. =)
2007-11-07 12:19:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Put some fire ,then air inside become hot and goes out thus we reduce the weight ,like hot air ballons
2007-11-07 06:05:10 · answer #3 · answered by money 1 · 0⤊ 0⤋
Helium.
2007-11-07 02:46:18 · answer #4 · answered by Gee Wye 6 · 0⤊ 0⤋
put a tight seal on the top, put in helium. lighter if you can get it off the ground.
2007-11-07 02:43:06 · answer #5 · answered by Barbara L 6 · 0⤊ 0⤋
termites
2007-11-07 03:05:44 · answer #6 · answered by mis42n 4 · 0⤊ 0⤋
a big fricking hole
2007-11-07 02:40:51 · answer #7 · answered by z88 3 · 1⤊ 0⤋
Yup, a hole.
2007-11-07 02:45:19 · answer #8 · answered by grits 2 · 0⤊ 0⤋
or a bomb
2007-11-07 02:46:53 · answer #9 · answered by http://www.livefish.com.au 1 · 0⤊ 0⤋