If you have children, it should be illegal to have a balloon ready to jump into and take off.
my backyard.
yes
it took about a year for the first hot air balloon to be made.
If there is warm air in the balloon, cooler air makes the balloon rise and if there is cold air in the balloon warmer air makes the balloon fall.
No, but you can build a snowman. Yes, you can inflate a balloon in a bottle, although it is more difficult than inflating a balloon that is not in a bottle. The only problem that this presents is that it is possible for the balloon to block the opening of the bottle so that air will be trapped between the balloon and the bottle, which would prevent the inflation of the balloon. However, if you use a drinking straw you can create an avenue for air to escape.
D: The hot air inside the balloon becomes less dense than the air outside the balloon.
The air inside a hot air balloon is the same as normal air around the balloon and the air you're breathing, only heated by the flame inside the balloon, hence HOT AIR balloon.
A balloon has a certain weight due to the material it's made of. When you blow air into the balloon, the weight of the air inside balances out the weight of the balloon material, making the total weight of the balloon and air the same as the original balloon.
To inflate a balloon, you can blow air into it by using your lungs to push air out of your mouth and into the balloon. Alternatively, you can use a pump to push air into the balloon.
The buoyant force on a hot air balloon is equal to the weight of the air displaced by the balloon. When the air inside the balloon is heated, it becomes less dense than the surrounding air, causing the balloon to rise. The buoyant force allows the balloon to float in the air.
The volume of a hot air balloon increases as the air inside the balloon expands when it is heated. As the balloon ascends and the air temperature decreases, the volume of the air inside the balloon decreases as well. The pilot can control the altitude of the balloon by controlling the temperature of the air inside.
with out the hot air the balloon would not rise