how hot air balloon function?
147395
A gas burner heats air inside the balloon and as the air becomes warmer it becomes less dense or lighter per unit of volume, compared to the surrounding air. The differance in the two air densities causes the balloon to float like a cork in water.  This is the reason balloonists launch their ballonons in the early morning when the air tempature is cooler.  The cooler the  outside air the less heat is needed in the balloon to get it off the ground saving fuel for a longer flight.
634831
because den u are decreasin d volume taken up the gas molecules and so as in boyle's law d air presure wud increase causinin d molecules 2 push on d balloon wall harder and so it bursts
537936
Use a shoe box.  Tape on some wheels and axles.  Put the balloons inside the box with the base of the balloons taped so all the air will go out the back.  When the air is released it will form a primitive rocket, propelling the box-car across the floor.\n\nI can't say this isn't rocket science, because technically, it is.
600666
A hot-air balloon ride is awesome. After they hit the burners it's so quiet and peaceful. I would probably go in fall depending on where you live so you can see all the leaves changing. I live in New Mexico so it's brown all year round. Plus, we have the Balloon Fiesta every October with 1000 balloons each year. It's so beautiful! It's also the only time you'll be sober and see a flying dinosaur!! :)
410065
Where are you going in that balloon?lol
399078
The air surrounding the flame is heated up. \n\nThe density of hot air is less and hot air goes up, the cooler light air fills that space. \n\nHence the shape of the flame is maintained.
1052
The hot air weighs less then unheated air. The Air molecules move around faster. With the lighter air, the lanterns float up.. Causeing the garbage to float into someone elses yard
310208
The balloon rises in atmosphere and remains intact till the point when its internal pressure is lower than the atmospheric pressure. At higher altitude where the atmospheric pressure is lower and the pressure inside the balloon is higher, it bursts as the rubber cannot withstand the internal pressure.
270335
There are air tight containers and there are air tight containers.  A birthday party balloon is airtight and ok, an airplane isn't.  Location works the same way.  If you blow up your pop bottle in the middle of a gravel pit, and clean up the mess, probably few people would care.  In someones face would be a different story.  The real worry is what are you going to do next?  \n\nI'd say, in the proper setting, your co2 toy sounds like fun and fairly safe.  Go for it!
1151586
A profound point. I think this is the reason: when you narrow the neck of a balloon when you let the air out, it makes a sort of farting sound. If the air inside this balloon smelled, it wouldn't smell as bad letting it out this way since only a little of it comes out at a time. However, if there's a huge opening in the balloon, all the air comes out at once, releasing all the smelly air into the world.
469382
depends on the time of day. During a hot day the air balloon would pop first because air heats up juch faster than water. at night the air balloon would actually shrink because the air in the balloon would contract because of the cold air.
23238
There was a story years ago about scientists experimenting with doing this exact thing.  They had an ozone maker under the balloon and let it off.  Can't find the article now though.\n\nSo yes, it is possible.  One theory of why its not being done would be cost - can we make enough ozone to make a difference?
838291
Good question!\n\nFirst law of thermodynamics states that the internal energy change ΔE of a system is equal to (Q - W). Where Q is the heat absorbed by the system and W is the work done BY the system on the surroundings.\n\nNow, as you already might be knowing that work can also be expressed in terms of pressure and volume as-\n\nW = PΔV (where P is pressure of the gas inside the system and ΔV is the change of volume)\n\n[Here: "system" = balloon; and "surroundings" = refrigerator]\n\nAnd as the change in volume (ΔV) in the case of balloon stated above is negative i.e it deflates, work must be negative i.e (minus W).\n\nNow, as Q is also negative (heat is given off by the balloon), the equation of First Law of thermodynamics reads-\n\nΔE = -Q - (-W)\nΔE = W - Q\n\nNow, if the balloon was large in volume, the change in internal energy ΔE would be positive and the balloon will either burst or move frantically in the refrigerator shelf.\n\nBut, if the balloon was a small one, it'd slowly become limp and deflate as the Q will overpower W (PΔV) in the equation and the internal energy ΔE will decrease and become negative.\n\nPlease note that I have made a lot of assumptions here that perhaps, might not be so easy to apply practically.\n\nThe points you'd have to consider are:-\n\n1-How tightly the balloon is wound so that air doesn't leak out of it.\n2- Whether or not there's a leakage in the balloon.\n3- The temperature of the balloon.\n4- The material of the balloon.\n\nStrictly speaking, the first law isn't even applicable in this case because the condition in the law is that the system (balloon) shouldn't be allowed to move. Its kinetic and potential energies should both be zero which clearly is not the case with our experiment.\n\nI hope this answer helps!\n\nGood luck!
351878
They pop. The higher the altitude, the lower the atmospheric pressure outside the balloon. But the same amount of gas is still inside the balloon, and it wants to be the same pressure as the air outside the balloon. Thus, the gas inside expands and pops your balloon.
1003953
Well, the different between air and helium on the weight of the balloon is marginal, so you would expect little or no observable distance. \n\nBut in principle its not as simple as is being made out here. Think for a moment about what keeps a ball up and what brings it down. Its hit into the air at first, and then a combination of gravity and air resistance bring it down. \n\nIn a vacuum the trajectory would depend only on initial velocity, because kinetic energy and potential energy both depend linearly on mass (so it cancels). In air the air resistance is proportional to square of the speed and size but not mass.\n\nNow, about that kick. Does it give 1) constant energy independent of the mass of the ball, 2) constant speed to the ball independent of its mass \n\nIf 1) then the heavier ball will be slower when kicked, so will not go as far\n\nIf 2) then the distance will be the same in vacuum as above but the larger ball will have more energy and so will take longer to slow by drag - it will go further
271092
as the temp goes up the molecules of gas move faster and collide more often with more energy into the balloon increaseing pressure and expanding the balloon.  As it cools the opposite happens.  Draw your own diagram!
968061
The volume should decrease because the colder air causes the gas molecules to lose kinetic energy and slow down.  This makes the air pressure in the balloon lower and the balloon's volume is reduced.