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Hot air balloons are based on a very basic scientific principle: warmer air rises in cooler air. Essentially, hot air is lighter than cool air, because it has less mass per unit of volume. A cubic foot of air weighs roughly 28 grams (about an ounce). If you heat that air by 100 degrees F, it weighs about 7 grams less. Therefore, each cubic foot of air contained in a hot air balloon can lift about 7 grams. That's not much, and this is why hot air balloons are so huge -- to lift 1,000 pounds, you need about 65,000 cubic feet of hot air.
If you're interested in getting a birds-eye-view of the world, then you should check out the paragliding article, video and images at Discovery's Fearless Planet. In the next section, we'll look at the different components of hot air balloons to find out how they heat the air.
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How do hot air balloons descend?
They have to let out the hot air a little at a time.
What gas is used for a hot airballoon?
I am fairly sure that hot air balloons use normal air. They rely more on the idea of bouyancy rather than using specal gases, such as helium. The hot air inside of the balloon is more bouyant than the cold air outside of the balloon. So that makes the balloon ascend till the temperature of the air inside of the balloon is equal to the temperature of the air outside of the balloon. Then as the air inside the balloon gets colder, the balloon starts to descend.
A deflated hot-air balloon weighs a total of 8000 n filled with hot air the balloon rises to a height of 1000 m how much work is accomplished by the hot air?
8J
What elements are used in an air balloon?
Hot air is common.
What is the direction control of an hot air balloon?
The pilot of a hot air balloon uses the burners to move in different directions. Some of the air is moving east, while some of the air is moving west. The pilot of the balloon will either deflate or inflate the balloon to catch the wind in a particular direction.
Why does a hot air balloon fly?
A hot air balloon flies because it is filled with hot air. Hot air rises and causes the balloon to lift from the ground.
Why does a hot balloon fly?
A hot air balloon flies because it is filled with hot air. Hot air rises and causes the balloon to lift from the ground.
Does a hot air balloon need CO2 to lift?
no, hot air air is used
Why is the size of balloon in the hot air balloon important?
Big enough to allow the hot air to create lift.
How much hot air does it take to raise a hot air balloon?
No set answer to that, it depends on how much the balloon has to lift.
What does density have to do with hot air balloons?
The burners on a hot air balloon create hot air, which rises into the balloon and displaces the cooler air from the balloon. Then the hot air, being less dense, will lift the balloon as the cooler surrounding air sinks below it. Once the air cools, the balloon will lose its lift and settle back to the ground. The hot air is only slightly less dense, so it requires a lot of volume to lift the comparatively smaller mass of the balloon and gondola.
Can a hot air balloon lift a car?
yes
Why is a hot air balloon able to lift itself?
because hot air rises
Why does a hot air balloon only go up when it is hot air?
Hot air is less dense then the surrounding air, meaning it's lighter then regular air, allowing it to naturally lift. If something catches that lifting air, and the air is so light that it can lift the required weight up, then it will lift. That's why a hot air balloon requires hot air to lift.
How does a hot air balloon return to Earth's surface?
A hot air balloon comes down when less lift is provided by reducing balloon air temperature to control descent.
A Hot-air balloon consists of a bag called the?
An envelope is the bag in which the hot air is trapped ito to give the balloon lift.
Why does an air balloon float?
If you mean hot air balloon then it floats because hot air rises because it is less dense and with enough hot air caught in the balloon it can lift create enough lift to take off into the air. If you mean a helium balloon then it rises because helium in the balloon is less dense then the air around it. Since less dense things rise to the top the balloon will float.
