Balloons
A balloon is an inflatable flexible bag filled with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air. Modern balloons can be made from materials such as rubber, latex, polychloroprene, or a nylon fabric, while some early balloons were made of dried animal bladders, such as the pig bladder. Some balloons are used for decorative purposes, while others are used for practical purposes such as meteorology, medical treatment, military defense, or transportation. A balloon's properties, including its low density and low cost, have led to a wide range of applications. The inventor of the rubber balloon, (the most common balloon) was Michael Faraday in 1824, via experiments with various gases.
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Some articles on balloons:
... In 1878 the school constructed and flew a hydrogen-filled balloon of 10,000 cubic feet (280 m3) capacity ... By 1879 the unit had 5 balloons ... In 1880 military balloon training and demonstration took place at Aldershot ...
... A balloon can only have buoyancy if there is a medium that has a higher average density than the balloon itself ... Balloons cannot work on the Moon because it has almost no atmosphere ... atmosphere – the pressure is only 1/160th of earth atmospheric pressure – so a huge balloon would be needed even for a tiny lifting effect ...
... Once inflated with regular, atmospheric air, the air inside the balloon will have a greater air pressure than the original atmospheric air pressure ... In the case of balloon, it's supposed to measure how many particles at any in any given time space collide with the wall of the balloon and bounce off ... The first concept of air pressure within a balloon that is necessary to know is that air pressures "try" to even out ...
... High-altitude balloons can be used to lift precursor gases, in tanks, bladders or in the balloons' envelope ... Balloons can also be used to lift pipes and hoses, but no moored balloon has ever been deployed to the necessary altitude ...
... The Aero30NG This tethered balloon 22,5 meters in diameter can receive up to 30 people at a time in its nacelle and up to 300 meters ... This balloon was installed at Disneyland in Paris, Ocean Park in Hong Kong and most recently Walt Disney World Resort in Orlando ... The Aero2 This is a charged helium balloon of 9 meters in diameter which offers a view to two passengers to around 90m above ground ...
Famous quotes containing the word balloons:
“Canaries in the morning, orchestras
In the afternoon, balloons at night. That is
A difference, at least from nightingales,
Jehovah and the great sea-worm.”
—Wallace Stevens (1879–1955)