If a sphere 20 feet in diameter enclosed a vacuum and weighed 300 lb. What amazing property would it posses?

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If a sphere 20 feet in diameter enclosed a vacuum and weighed 300 lb. What amazing property would it posses?

2006-12-05 12:27:18 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics

4 answers

Not very amazing, but it would float if freed at sea level. The density of air at sea level is 1.25 kg/m^3, and the density of your sphere is 1.15 kg/m^3. So the thing would float in the atmosphere.

2006-12-05 13:14:14 · answer #1 · answered by 1,1,2,3,3,4, 5,5,6,6,6, 8,8,8,10 6 · 1⤊ 0⤋

Assuming atmospheric pressure within the sphere - with a 20 foot diameter and rigid in a vacuum at only 300 lbs - the material from which it is constructed would have to be from Area 51 :-)

2006-12-05 12:49:13 · answer #2 · answered by LeAnne 7 · 1⤊ 1⤋

Negative Pressure.

2006-12-05 12:32:46 · answer #3 · answered by Jud R 3 · 0⤊ 2⤋

Your sphere would be bouyant, like a helium balloon.

2006-12-05 12:59:25 · answer #4 · answered by PoppaJ 5 · 2⤊ 0⤋