Vacuum - Revision history

Jburk at 23:26, 17 December 2018

2018-12-17T23:26:55Z

Farred: addition

2013-02-04T19:02:20Z

addition

ChristiaanK: Created page

2013-02-04T18:09:58Z

Created page

New page

{{Stub}}
A '''vacuum''' is a volume which does not contain a significant amount of matter. ''Hard vacuum'' and ''soft vacuum'' are used for very low and slightly low pressures (relative to Earth's atmosphere) and are not exactly defined. The average surface pressure of Mars can be regarded as a soft vacuum.

In reality, no space is truly empty and there is no sharp transition between the atmosphere of a planet and the vacuum beyond. Instead the atmosphere thins smoothly outward.

==Industrial use==
Due to the lower atmospheric pressure of Mars, the creation of industrial vacuum should be easier.
*Vacuum degassing is an important process in the production of [[steel]]. By exposing molten metal to a vacuum, gasses such as [[carbon dioxide]] and [[carbon monoxide]] are released, allowing the creation of very low-carbon metals (provided that the metal has not been [[oxygen killing|oxygen killed]]). It can also remove other contaminants such as [[nitrogen]] and [[hydrogen]].
*Heated vacuum chambers are used in the production of spacecraft. By heating the spacecraft components in a vacuum chamber, they are allowed to outgas, which prevents excessive [[outgassing]] after they are sent into space.
*Vacuum chambers are needed to to test spaceflight equipment such as pressure suits.

[[Category:Physics]]
[[Category:Industry]]
[[Category:Spaceflight science]]

← Older revision		Revision as of 23:26, 17 December 2018
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	*The atmosphere of Mars is a sufficient quality vacuum to serve as a good insulator. It merely needs to be contained in a space so that the winds of Mars do not blow it about. The high speed winds of Mars can move considerable heat in spite of the thinness of the atmosphere.		*The atmosphere of Mars is a sufficient quality vacuum to serve as a good insulator. It merely needs to be contained in a space so that the winds of Mars do not blow it about. The high speed winds of Mars can move considerable heat in spite of the thinness of the atmosphere.

−	[[Category:~~Physics]]~~	+	[[Category:Atmospheric Sciences]]
−	~~[[Category:Industry]]~~
−	~~[[Category:Spaceflight science~~]]

@@ Line 9: / Line 9: @@
 *Heated vacuum chambers are used in the production of spacecraft. By heating the spacecraft components in a vacuum chamber, they are allowed to outgas, which prevents excessive [[outgassing]] after they are sent into space.
 *Vacuum chambers are needed to to test spaceflight equipment such as pressure suits.
+*The atmosphere of Mars is a sufficient quality vacuum to serve as a good insulator.  It merely needs to be contained in a space so that the winds of Mars do not blow it about.  The high speed winds of Mars can move considerable heat in spite of the thinness of the atmosphere.
 [[Category:Physics]]
 [[Category:Industry]]
 [[Category:Spaceflight science]]