Gmanme said:Take the pressures from 30k, 60k and 90k, and find out how big the balloon would have to be to lift a total wieght of 500 lbs at these altitudes.
High altitude balloon gas expansion is the process by which the gas inside a balloon expands as it rises to higher altitudes. This is due to a decrease in atmospheric pressure, which allows the gas molecules to spread out and take up more space.
At higher altitudes, the atmospheric pressure is lower, meaning there are fewer air molecules pushing down on the gas inside the balloon. This decrease in pressure allows the gas molecules to move more freely and take up more space, causing the gas to expand.
As the gas inside the balloon expands, it becomes less dense than the surrounding air. This makes the balloon less buoyant, causing it to rise even higher. However, as the balloon rises, the atmospheric pressure continues to decrease, and eventually the gas inside will expand to the point where the balloon bursts.
The most common gas used in high altitude balloons is helium, due to its low density and non-flammability. Hydrogen is also sometimes used, but it is highly flammable and therefore poses a safety risk.
High altitude balloon flights are often used for scientific research, as they can reach altitudes that are difficult or impossible to reach with other methods. The expansion of gas at high altitudes can also be measured and studied to better understand atmospheric conditions and dynamics.