2007-01-23 11:39:22 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
If a balloon weighs anything at all, without air, and air weighs anything at all, then the weight of both of them together has to be more than the weight of either one alone. So, yes, a balloon weighs more with air in it.
That doesn’t prevent the balloon from having positive buoyancy, if the density of hotter air inside the balloon is less than the density of colder air outside the balloon.
2007-01-23 11:49:41 · answer #1 · answered by hevans1944 5 · 0⤊ 0⤋
A balloon with air in it weighs more than a balloon without it. This is because air does have weight so when added to the weight of the balloon the weight is greater. To find out how much see if your school or a college near you will let you use a sensitive enough weight scale to measure exactly how much. Of course this assumes the air in the balloon is not hotter than the air around it - that's what make hot air balloons float.
2007-01-23 19:58:16 · answer #2 · answered by Twizard113 5 · 0⤊ 0⤋
Air has weight (mass) - because air expands in the warmth and contracts in the cold the mass varies but at a typical room temperature air weights about 1.3 kilograms per cubic metre.
The more air you blow into a balloon the heavier it becomes. Assume your baloon had a volume of 10000 cubic centimetres (a largish balloon) then the air inside it would weigh 13 grams.
2007-01-23 19:53:06 · answer #3 · answered by Trevor 7 · 0⤊ 0⤋
In air they weigh the same. In some other environment, like a helium atmosphere, the one with the air in it weighs more than the helium it displaces (air being heavier than nothing and the skin weighing the same.)
2007-01-23 19:44:21 · answer #4 · answered by Mike1942f 7 · 0⤊ 0⤋