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The volume of air increases on its heating hence the balloon rises on heating

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Q: The air in hot air balloon is heated to make the balloon rise?
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Why does a balloon need hot air?

Hot air is less dense compared to cold air. The heated air in the balloon will rise, making the balloon float in the air.to make it rise.


Why does heating the air in hot air balloon make it rise?

Hot air is lighter than cold air, so cold air sinks and hot air rises; that makes the hot air balloon rise (if the air around the hot air balloon is heated as well, it won't rise, or sink if in the air).


Why would heating the gas in a hot air balloon make the balloon rise?

When the gas (air) in a hot air balloon is heated it becomes less dense. This makes the balloon more buoyant so it rises.Because heating the air inside the balloon makes it less dense than the air surrounding the outside of the balloon, so it will rise.


Why did they call it the hot air 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.


Why does a hot air balloon rise when the air inside it is heated up?

The hot pressure{air}builds up so the balloon goes up.


Why do hot air balloons travel upward?

The heated air causes the whole balloon to rise. When the air inside the balloon cools down, or when the hot air is let out, the balloon goes down.


Why the hot air balloon needs hot air to make it rise?

Hot air balloons use hot air because hot air rises above cold air. The air inside the balloon is heated above the temperature of the air outside the balloon. The warmer air trapped inside the balloon then causes the balloon to float above the outside colder air.


Why does a hot air balloon rise when the air inside it is heated?

Heating causes the air inside the balloon to expand. Some of the warm air leaves through the bottom opening of the balloon, keeping the pressure constant.


Why do hot air balloon rise up?

because the density in the balloon is heated so it rises higher than it being unheated


How is a hot balloon lifted into the air?

to make a hot air balloon rise you use hot air


What causes a hot air balloon to rise?

Fire contacting with the air inside the balloon. The heated air within the balloon is less dense than the ambient air surrounding it, therefore for the given volume it is lighter and so rises.


Why do air balloons rise when heated air is trapped inside the balloon?

Warm air is heavier than cold air so it rises up.