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Encyclopedia > Gigapascal

The gigapascal, symbol GPa is an SI unit of pressure. It is equal to 1,000,000,000 pascals (Pa), or about 10000 atmospheres. The International System of Units (symbol: SI) (for the French phrase Système International dUnités) is the most widely used system of units. ... Pressure (symbol: p or P) is the measure of the force that acts on a unit area. ... The pascal (symbol Pa) is the SI unit of pressure. ...

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Icy Hydrogen (294 words)
Mao's team compressed water between a pair of diamond anvils to a pressure of 17 gigapascals (170,000 times normal pressure at sea level), then bombarded it with high-energy x-rays.
The key was that the team stumbled on the right energy level of x-radiation, about 10,000 electron volts under a pressure of at least 1 gigapascal, for the structure to form and retain its integrity.
Researchers predict that the new alloy may provide information about the behavior of water in extreme temperature and energy conditions, as well as potentially having uses in developing new rocket fuels, since it must contain a large amount of energy to exist.
orbital loop (267 words)
The mass required for an Earth loop would be in the order of 10 000 tons.
The maximum tensile forces would not exceed 2 gigapascal.
Potential applications would be the transfer of, for example, helium-3 from lunar strip-mining bases for nuclear fusion on Earth.
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