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Outside temperature is largely immaterial. It is really the difference between the temperature inside and outside of the balloon envelope that generates the lift. If both are exactly the same, then the balloon will simply fall under gravity -- it has no buoyancy. As the inside temperature increases, so does its buoyancy. Eventually, the difference will be sufficient to overcome gravity, and the greater the difference, the faster it will rise. When the optimum altitude is achieved, the air inside is allowed to cool to an optimum level to maintain that altitude; the optimum temperature will vary according to the outside temperature and the weight of the balloon. The outside temperature will vary according to altitude, as will air pressure outside of the balloon, therefore there is no single answer to the question. It is the difference in temperature that is important, not the actual temperature.

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What makes the air balloon go up and move in the sky?

An air balloon rises due to the hot air inside it being lighter than the cooler air outside. By controlling the temperature of the air inside with a burner, the balloon can go up or down. To move horizontally, the balloon must catch wind currents and navigate by ascending or descending to find different wind directions at various altitudes.


Why don't hot air balloons take flight in hot humid weather?

Hot air balloons work by heating the air inside the balloon to make it less dense than the surrounding air, allowing it to rise. In hot, humid weather, the air is already less dense, so heating it further may not provide enough lift for the balloon to take flight. Additionally, the moisture in humid air can affect the performance of the balloon's burners, making it difficult to control the temperature of the air inside.


Why must hot air balloon pilots do occasional blasts on the burner?

Hot air balloon pilots do occasional blasts on the burner to maintain the desired altitude. By releasing short bursts of hot air, pilots can control the temperature inside the balloon and regulate its altitude to ensure a safe and stable flight.


How do you keep an hot air balloon in the air indefinitely?

To keep a Hot air balloon in the sky indefinitely you must keep all the air sealed and warm. The Hot air's lower density will keep it above the more dense, colder air. To demonstrate this put air inside a bottle and place it on-top of water. Notice how it stays "afloat". ======================================================== To keep a hot air balloon aloft indefinitely, the temperature of the air inside the balloon must be hot enough so that the difference in weight of the air inside the balance and an equivaletnt volume outside of the balloon equals or exceeds the total weight of the balloon and passengers. It doesn have to be air tight. Hot air balloons are open on the bottom. But it has to be air tight enough that the burner will be capable of keeping the air hot enough to maintain altitude.


What does the hot air balloon do if the weather is hot?

Hot air balloons are most efficient in cool, stable weather conditions. When the weather is hot, the balloon may have more difficulty gaining altitude due to the already warm air temperature. Pilots may need to adjust their flight plans or wait for cooler temperatures to achieve desired performance.

Related Questions

What must happen for a balloon to float in the air?

For a balloon to float in the air, it must be filled with a gas that is lighter than the surrounding air, such as helium or hot air. This creates a buoyant force that allows the balloon to rise and float.


How long will balloons float filled with exhaled air?

When a balloon is blown up by mouth, it will not float, but fall to the ground. This is because the air inside is the same density as the air outside. For a balloon to float up into the air, it must be inflated with a gas that is lighter than air - such as helium.


How does a hot air balloon float even though it is so heavy?

Well the basic answer is that when the balloon is 'floating' it is not heavy. The hot air inside the balloon is less dense and therefore lighter than the ambient air. The hotter it is, the lighter it is. When the weight loss of the air inside the balloon is equivalent to the weight of the balloon and equipment, passengers, etc., then it will float. The weight reduction of heated air is quite small which is why balloons have to be so big.


Why wont a blloone with carbon dioxide float?

To float in air, the density of the balloon (divide the combined mass of balloon + contents by its volume) must be LESS than that of the same volume of air. If the gas inside the balloon has a greater density than air, the combined object (balloon + contents) won't have less density than air, either.


In a hot air balloon air is heated by a flamehow does this enable the balloon to float in the air?

Air, like any other substance has weight, that weight is directly related to its density. The warmer the air is the less dense it is therefore the lighter it is. A balloon full of lighter air will float upward just like a piece of wood in a swimming pool, the wood is less dense than the water.


What force holds a hot air balloon in the air?

Buoyancy is what helps hot air balloons float through the air.In order for an object to float it must be surrounded by a denser atmosphere. Balloon pilots control the buoyancy of their balloon by heating the air inside the envelope of the balloon. When air is heated it expands (air molecules expand-becoming less dense) and it also rises when it is surrounded by colder denser air (molecules closer together becoming more dense). These changes in air density is what allow balloons to rise and fall.


Does a balloon show that air can be compressed?

Yes, a balloon shows that air can be compressed. The pressure in the balloon is higher than the pressure outside the balloon. The ideal gas law is PV = nRT where: P = pressure V = volume n = the number of moles of gas (the amount of gas) R = the ideal gas constant T = temperature So for the given volume of the balloon, and at a set temperature, if the pressure goes up, the amount of gas (the number of moles) must also go up. That means that the gas has been compressed.


What makes the air balloon go up and move in the sky?

An air balloon rises due to the hot air inside it being lighter than the cooler air outside. By controlling the temperature of the air inside with a burner, the balloon can go up or down. To move horizontally, the balloon must catch wind currents and navigate by ascending or descending to find different wind directions at various altitudes.


Must it be a certain temperature outside for a cow to give birth?

No. Cows can give birth in pretty any temperature, from -30oC to 40oC.


Why don't hot air balloons take flight in hot humid weather?

Hot air balloons work by heating the air inside the balloon to make it less dense than the surrounding air, allowing it to rise. In hot, humid weather, the air is already less dense, so heating it further may not provide enough lift for the balloon to take flight. Additionally, the moisture in humid air can affect the performance of the balloon's burners, making it difficult to control the temperature of the air inside.


Why does a CO2 filled balloon deflate quicker than a helium filled balloon given that helium atoms are smaller and monatomic?

Well...it's because they're not the same balloons. There is a product out there called Super Hi-Float. You coat the inside of a balloon destined to be filled with helium with it, and it helps seal the pores of the latex hence holding the helium in longer. You probably wouldn't do this with a balloon you're going to fill with CO2.


Suppose the temperature of the air in a balloon is increased if the pressure remains constant.. what quantity must change Would it be Volume or Number of molecules or Compressibility OR Adhesion?

If the pressure is kept constant while increasing the temperature of the air in a balloon, the volume of the gas inside the balloon would change. This is because as the temperature rises, the gas molecules gain energy and move faster, leading to an increase in volume to maintain a constant pressure.