2007-09-11 17:41:34 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
He put a hole in the barrel
2007-09-11 17:44:38 · answer #1 · answered by Anonymous · 3⤊ 0⤋
The definite correct answer to this particular riddle is a hole. However, in general, if the barrell were hermetically sealed, and filled with helium, hydrogen, or any other gas that had a lower molecular weight than air, it would be lighter than 20 pounds. This is because an equivalent amount of helium in the barrell would weigh slightly less than that of air.
2016-05-17 12:42:56 · answer #2 · answered by ? 3 · 0⤊ 0⤋
This maybe one right answer. Put in a ginourmous balloon, and pump it full of helium. Cap it off. Now weigh it. You got 2 somethings in it, weighing way less than 20 pounds.
2007-09-11 17:50:32 · answer #3 · answered by Dennis B 5 · 0⤊ 0⤋
Sorry anti gravity or negative gravity doesn't exist.
So you have to be talking about hydrogen or helium, two lighter than air gases which will provide lift to the barrel IF the barrel is airtight. However, compared to the weight of a barrel the lift wouldn't be that great.
2007-09-11 17:46:29 · answer #4 · answered by Dan S 7 · 0⤊ 0⤋
he fills it with hydrogen or helium gas
2007-09-11 17:48:13 · answer #5 · answered by Seven Red 2 · 0⤊ 0⤋
helium
2007-09-11 17:46:29 · answer #6 · answered by Anonymous · 1⤊ 0⤋