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Archimedes' principle: an object experiences a lifting force (buoyant force) equal to the weight of the fluid being displaced by the object.
Helium (He)and hot air are lighter than the normal air near the ground level. If the balloon is filled with He or heater air, near the ground level, the normal air that the balloon displaced has a heavier weight that the weight of He or hot air inside the balloon. The net force is up, assuming the balloon itself is weightless (the balloon fabric is so thin that the weight is negligible). When the balloon reaches the upper atmosphere where the surrounding air is as light as the hot air, the balloon will stop ascending.
As humans, we are used to living at 1 atmosphere of pressure, so we rarely think about it. We normally don't feel the pressure on us because the human body is primarily made up of liquid, and liquids are basically non compressible. At times, we do notice changes of pressure, in our ears. You may have noticed your ears "popping" when flying, driving in the mountains, or even going up and down in an elevator. This is because our ears have an air space in them, and air, like all other gases, is compressible.
Boyle's Law states a gas will compress proportionately to the amount of pressure exerted on it. For example, if you have a 1 cubic foot balloon and double the pressure on it, it will be compressed to 1/2 cubic foot. Increase the pressure by 4, and the volume will drop to 1/4 the size etc. This theory was discovered by Sir Robert Boyle, a 17th century scientist. The theory known as Boyle's Law and it states: If the temperature remains constant, the volume of a given mass of gas is inversely proportional to the absolute pressure.
The reverse is also true and answers your question more directly. A half filled balloon at 2 atmospheres (14 ft underwater) will double its pressure when it rises to the surface at 1 atmosphere. It would therefore become a full balloon. That is why divers exhale when surfacing on Scuba.
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Why would heating the gas inan air balloon make the balloon rise?
because as you heat the gas, you cause the gas to expand on the container (whish is a balloon), this lowers the density, and a less dense fluid submersed in a denser fluid will rise, like an air bubble rises from underwater
How would you make a balloon get the maximum elevation it can get?
Make the balloon capable of further expansion. That way as the balloon rises and the barometric pressure falls the balloon can expand and allow its internal gases to achieve a constantly decreasing density.
What would happen if you put a balloon in the sun?
The balloon would heat up and expand as the air inside it warms up. If the temperature exceeds the balloon's capacity, it could burst.
What would happen to a balloon if you filled it with cooler air and then placed it in the hot sun for an hour?
The cooler air inside the balloon would increase in temperature, causing it to expand and potentially burst the balloon. This is because gases expand when heated.
What would heating the gas in an air balloon make the balloon rise?
Simple...hot air rises..
What would cause a balloon to expand if taken to the of a mountain?
Lowered Pressure
Why can't a hot air balloon rise higher than it does?
A hot air balloon rises until it reaches the same density as the surrounding air, at which point it stops ascending. This is due to the physics of buoyancy and the balance between the weight of the balloon and the lift generated by the heated air inside it. If the air inside the balloon is heated further, it expands and the balloon will descend as it becomes denser than the surrounding air.
What would happen if you inflated a balloon on the moon?
The balloon would expand due to the lack of atmosphere on the moon, but it wouldn't burst because the pressure inside the balloon would equalize with the low pressure outside. Additionally, the balloon would float in the lower gravity environment of the moon.
What would happen if a balloon that was blown up at a low altitude is brought to a high altitude?
The balloon would expand as it rises in altitude due to the decrease in air pressure. If it expands too much, it may pop or burst because the external pressure is lower than the internal pressure from the air inside the balloon.
What would cause a balloon to expand if taken to the top of the mountain?
Lowered Pressure
What would cause a balloon to expand if taken to top of mountain?
Lowered Pressure
What would cause balloon to expand if taken to the top of a mountain?
Lowered Pressure
