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2. Two-balloon experiment - Wikipedia

   en.wikipedia.org/wiki/Two-balloon_experiment

   The lower pressure balloon will expand. Figure 2 (above left) shows a typical initial configuration: The smaller balloon has the higher pressure because of the sum of pressure of elastic force Fe which is proportional to pressure (P=Fe/S) plus air pressure in small balloon is greater than air pressure in big balloon.

3. Inflatable - Wikipedia

   en.wikipedia.org/wiki/Inflatable

   A balloon is an inflatable flexible filled with air and also gas, such as helium, hydrogen, nitrous oxide or oxygen. Modern balloons can be made from materials such as latex rubber , polychloroprene , or a nylon fabric, while some early balloons were made of dried animal bladders [ citation needed ] .

4. Balloon - Wikipedia

   en.wikipedia.org/wiki/Balloon

   Balloon rockets work because the elastic balloons contract on the air within them, and so when the mouth of the balloon is opened, the gas within the balloon is expelled out, and due to Newton's third law of motion, the balloon is propelled forward. This is the same way that a rocket works.

5. Long Island couple wants to ‘Make Christmas Great Again ...

   www.aol.com/long-island-couple-wants-christmas...

   It only takes about 10 to 15 minutes for it to reach full size, but it needs continuous air to stay inflated. “When we put it up on the front lawn, it definitely looked larger than life ...

6. Airship - Wikipedia

   en.wikipedia.org/wiki/Airship

   The air-filled red balloon acts as a simple ballonet inside the outer balloon, which is filled with lifting gas. A ballonet is an air bag inside the outer envelope of an airship which, when inflated, reduces the volume available for the lifting gas, making it more dense. Because air is also denser than the lifting gas, inflating the ballonet ...

7. Weather balloon - Wikipedia

   en.wikipedia.org/wiki/Weather_balloon

   Transosondes, weather balloons with instrumentation meant to stay at a constant altitude for long periods of time to help diagnose radioactive debris from atomic fallout, were experimented with in 1958. [6] The drone technology boom has led to the development of weather drones since the late 1990s. [7]

8. High-altitude balloon - Wikipedia

   en.wikipedia.org/wiki/High-altitude_balloon

   Geostationary balloon satellites (GBS) are proposed high-altitude balloons that would float in the mid-stratosphere (60,000 to 70,000 feet (18 to 21 km) above sea level) at a fixed point over the Earth's surface and thereby act as an atmospheric satellite. At those altitudes, air density is around 1/15 to 1/20 [37] of what it is at sea level ...

9. Balloon (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Balloon_(aeronautics)

   A hot air balloon can only stay up while it has fuel for its burner, to keep the air hot enough. The Montgolfiers' early hot air balloons used a solid-fuel brazier which proved less practical than the hydrogen balloons that had followed almost immediately, and hot air ballooning soon died out.