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Hot air is less dense than cold air, thus hot air rises in cold air. Hot air balloons trap the hot air, thus creating an upward force at the top of the balloon. With sufficient mass, the upward force upon the balloon can overcome gravity, lifting both the balloon and the burner (used to heat the air) up off the ground. To lift people you need a much larger envelope to hold the required mass of hot air to overcome the gravitational pull.
The air in the balloon is heated by a burner to make it expand (become less dense). They have a lever that they pull that releases fire.The fire makes hot air and it hits the top of the hot air balloon that makes it rise.
Helium-filled balloons are more commonly known as blimps (airships) which do not use burners because helium is lighter-than-air to begin with. Helium replaced hydrogen which was originally used in blimps. Using burners on hydrogen would have been foolhardy at best (refer to the Hindenburg disaster).
What else can I help you with?
What source is used to fly hot air balloons?
Wind !... The balloons are filled with hot air, which causes them to rise. They are then at the mercy f the wind direction.
Is a hot air balloon filled with helium?
No, hot air balloons are typically filled with hot air to become buoyant and rise. Helium is an alternative gas used in some balloons, like party balloons or weather balloons, due to its lighter weight than air.
Does helium rise?
yes honey, that's why hot air balloons rise
How high do hot air balloons go up?
they contain helium molecules which are lighter than the air we breath making the balloons rise
Is hot air balloons filled with helium?
Hot air balloons are typically filled with hot air, not helium. The hot air inside the balloon is less dense than the surrounding air, causing it to rise. Helium balloons, on the other hand, are typically smaller and used for decorative purposes or in scientific experiments.
Why do you think hot-air balloons can rise into the air?
Hot-air balloons can rise up into the air because hot air is lighter, allowing it to float up into the sky.
What source is used to fly hot air balloons?
Wind !... The balloons are filled with hot air, which causes them to rise. They are then at the mercy f the wind direction.
Will a balloon rise if the air inside is hot?
The heating of the air through the use of a burner is what makes balloons rise.
Which gas do you use for hot air balloons?
Hot air balloons typically use propane gas as a fuel source for the burner that heats the air inside the balloon envelope. The propane is burned to heat the air, which causes the balloon to rise.
Why are hot air balloons able to rise into the air?
Hot air balloons rise because when the air inside the balloon is heated, it becomes less dense than the surrounding cooler air. This difference in density creates lift, causing the hot air balloon to float upward.
What 2 things that use hot air to rise?
Hot air balloons and thermal air currents are two things that use hot air to rise. The heating of the air makes it less dense, causing it to become buoyant and lift objects or create upward movement.
Does a hot air balloon have helium inside it?
Hot air balloons do not use helium; they are typically filled with hot air. Helium is non-flammable and more commonly used in other types of balloons like weather balloons or party balloons. The hot air inside a hot air balloon is what allows it to rise and float.
Is a hot air balloon filled with helium?
No, hot air balloons are typically filled with hot air to become buoyant and rise. Helium is an alternative gas used in some balloons, like party balloons or weather balloons, due to its lighter weight than air.
Does helium rise?
yes honey, that's why hot air balloons rise
How high do hot air balloons go up?
they contain helium molecules which are lighter than the air we breath making the balloons rise
Why do balloons float up into the air?
At a hot air balloon festival, hot air balloons slowly fill and then rise majestically in the predawn sky. These hot air balloons fly because of two fundamental principles of physics: the ideal gas law and Archimedes's principle.
Is helium used in hot air balloons?
No, it is not. "Regular" air is used, and it is heated. Hot air is less dense than cooler air, and it will rise. If hot air is trapped in an envelope, it will give lift to the envelope and an attached payload.
