fire
When the air inside a balloon cools, it will also contract, therefore the balloon will partially deflate.
No, because no air is being pumped into it, only heated up.
They are not! The air inside them is trapped in the balloon and heated, expands, becomes less dense and rises therefore pulling the balloon up with it. If helium was used it would explode! :)
when a balloon is filled up with air and then heated. remember that the particles of air are free to move. so when it is heated the particles will gain more energy and they stars to move faster. when there is too much energy between the particles they escape by popping the balloon. the more heat the more faster the particles move. it wil be the same process if the ballon is filled up with water and then heated.(water and air particles are heated up by convection currents.) if you heat just a ballon then the ballon will melt because of the property of the meterial it is made of. hope i helped:)
fire
When in the sun the balloon gets slightly bigger, when in the refrigerator the balloon shrinks.
The balloon would get larger as the air pressure outside it dropped. At some height, the balloon would get large enough to burst.
It would probably fill up with water, and then you'd have a water balloon.
When the air inside a balloon cools, it will also contract, therefore the balloon will partially deflate.
A chemical reaction in a hot air balloon can be when the propane is heated up. That is a chemical reaction because something has heated up.
When the air inside a balloon cools, it will also contract, therefore the balloon will partially deflate.
The hot pressure{air}builds up so the balloon goes up.
because the density in the balloon is heated so it rises higher than it being unheated
Water is very good at soaking up heat. When the water-filled balloon is heated the water Draws the heat away from the rubber. For the air filled balloon, not so much. The rubber heats up, weakens, and breaks.
The air alone is not able to blow up a balloon. When air in the bottle is heated with a balloon on top of it, the air expands due to the heat and moves and finds more space. This in turn will blow up the balloon.
A hot air balloon is called an hot air balloon because, the inside is heated up to make it less dense, allowing it to rise. Meaning, your heating up the air inside the balloon, hence, the name: Hot air balloon.