It is filled with a gas that is lighter than air.
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.
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.
To launch a hot air balloon, the pilot first inflates the balloon with a large fan to fill it with cold air. Then, a burner is used to heat the air inside the balloon until it becomes hot and the balloon starts to rise. Once it is fully inflated and upright, the passengers can board and the balloon will take off.
When you inflate a balloon, the air goes inside the balloon and fills it up. The air molecules push against the walls of the balloon, causing it to expand and take on its inflated shape.
An untied inflated balloon flies because the air inside the balloon is less dense than the air outside, creating a lift force. As the balloon rises, the air pressure decreases, causing the balloon to expand further and increase in volume. This expansion of the balloon allows it to continue rising until the forces of gravity and air resistance balance out.
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.
A deflated balloon is lighter than an inflated balloon because the air inside the inflated balloon adds weight to it. When the air is released, the balloon becomes lighter because it is no longer burdened by the added weight of the air molecules.
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.
There is no difference at all if the balloon is not inflated or inflated with air.
When the balloon is inflated, it is filled with air, which has less mass than the solid material of the deflated balloon. So overall, the balloon has less mass when inflated because the mass of the air inside it is lighter than the solid material of the balloon.
The duration an air-filled balloon stays inflated can vary based on factors such as the quality of the balloon, temperature, and air pressure. Under normal conditions, an air-filled balloon can stay inflated for several days to a week before starting to deflate.
The volume of the balloon decreases
When a balloon is filled with helium, it becomes buoyant because helium is lighter than the surrounding air. This causes the balloon to rise and float. The helium gas inside the balloon also increases the pressure, which helps the balloon maintain its shape and stay inflated.
An inflated balloon weighs more than a deflated one because the air inside adds mass to the balloon. When the balloon is deflated, it contains less air or no air at all, resulting in less weight.
The balloon is inflated and stays that way because it is filled with a gas, such as helium or air, that is less dense than the surrounding air. This causes the balloon to float and maintain its inflated shape due to the difference in pressure inside and outside the balloon.
Closing the mouth of an inflated balloon helps to keep the air trapped inside. If the mouth is left open, the air can escape and deflate the balloon. Closing the mouth also helps to create pressure inside the balloon, keeping it inflated.
Yes, the air in an inflated balloon has potential energy due to the elastic potential energy stored in the balloon's stretchy material. When the balloon is released, this potential energy is converted into kinetic energy as the air rushes out.