It could possibly be many types of gasses. The most common is helium(He)
If you mean a hot air balloon, it is the expansion of the air caused by the propane burner. If you mean any balloon, it is the ability of the material to hold the air or gas inside which keeps it inflated.
Hot air balloons work by heating the air inside the balloon envelope using a propane burner. When the air inside the balloon is heated, it becomes lighter and less dense than the surrounding air, causing the balloon to rise. The envelope of the balloon is sealed, which allows the hot air to be trapped inside and keep the balloon aloft.
Yes, a difference in air temperature can affect the size of a balloon. When air temperature increases, the air inside the balloon expands, causing the balloon to inflate. Conversely, when air temperature decreases, the air inside the balloon contracts, causing the balloon to deflate.
When the air inside the balloon is heated, it becomes less dense than the surrounding cooler air. This density difference creates a buoyant force, causing the balloon to rise. As long as the air inside the balloon is heated, it will continue to rise.
The density of a hot air balloon is the greatest when the air inside the balloon is at its maximum temperature. As the air inside the balloon is heated, it expands and becomes less dense compared to the surrounding air, causing the balloon to rise.
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.
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D: The hot air inside the balloon becomes less dense than the air outside the balloon.
The density of the air inside a hot air balloon is greatest when the air inside is coolest. As the air inside the balloon is heated, it expands and becomes less dense compared to the surrounding air, causing the balloon to rise.
A hot air balloon is normally powered with propane. Other than that, it is just ordinary air used inside the balloon.
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.
Heating the air inside the balloon makes it less dense than the surrounding air, causing the balloon to float upwards. As the air inside the balloon cools, it becomes denser and the balloon descends. The pilot can control the altitude by adjusting the temperature of the air inside the balloon.
The pressure inside a balloon is created by the air molecules contained within the balloon pushing against the walls of the balloon. As more air is blown into the balloon, the number of air molecules increases, leading to a higher pressure inside the balloon.
When air is blown into a balloon, it fills the space inside. The pressure of the air increases, causing the balloon to expand. If the balloon is sealed, the air inside remains trapped, making the balloon float or hover depending on the amount of air inside.
D: The hot air inside the balloon becomes less dense than the air outside the balloon.
As the balloon cools down, the air inside will also cool. This will cause the air pressure inside the balloon to decrease, potentially leading to the balloon descending back to the ground due to the decreased pressure.
If the volume of the air inside a balloon increases while the mass remains constant, the density of the air inside the balloon will decrease. This means that the air inside the balloon will become less dense.