Cross-sectional area - Revision history

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	[[Category:Done ~~2016~~-01-15]]		[[Category: Done 2021-10-29]]
	[[File:crossection.png\|350px\|thumb\|right\|Figure 1. The cross-sectional area of a cylinder is equal to the area of a circle if cut parallel to the circular base.<ref>''Created internally by a member of the Energy Education team.''</ref>]]		[[File:crossection.png\|350px\|thumb\|right\|Figure 1. The cross-sectional area of a cylinder is equal to the area of a circle if cut parallel to the circular base.<ref>''Created internally by a member of the Energy Education team.''</ref>]]
	<onlyinclude>The '''cross-sectional area''' is the area of a two-dimensional shape that is obtained when a three-dimensional object - such as a cylinder - is sliced perpendicular to some specified axis at a point.</onlyinclude><ref>Math Captain. (January 9, 2016). ''Cross Section'' [Online]. Available: http://www.mathcaptain.com/geometry/cross-section.html</ref>		<onlyinclude>The '''cross-sectional area''' is the area of a two-dimensional shape that is obtained when a three-dimensional object - such as a cylinder - is sliced perpendicular to some specified axis at a point.</onlyinclude><ref>Math Captain. (January 9, 2016). ''Cross Section'' [Online]. Available: http://www.mathcaptain.com/geometry/cross-section.html</ref>
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	Additionally, the cross-sectional area is important when looking at [[nuclear chain reaction\|nuclear reaction]]s. The cross-section of some [[nucleus]] is used to define the effective size of a nucleus, and thus this value can be used to express the probability of some nuclear reaction taking place.<ref name="RE1">HyperPhysics. (January 9, 2016). ''Nuclear Reactions'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/nucrea.html</ref> As well, the [[neutron cross section]] is particularly important as it expresses how likely a reaction between a [[neutron]] and a target nucleus is, the basis for [[nuclear fission]].		Additionally, the cross-sectional area is important when looking at [[nuclear chain reaction\|nuclear reaction]]s. The cross-section of some [[nucleus]] is used to define the effective size of a nucleus, and thus this value can be used to express the probability of some nuclear reaction taking place.<ref name="RE1">HyperPhysics. (January 9, 2016). ''Nuclear Reactions'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/nucrea.html</ref> As well, the [[neutron cross section]] is particularly important as it expresses how likely a reaction between a [[neutron]] and a target nucleus is, the basis for [[nuclear fission]].

			==For Further Reading==
			*[[Nuclear fission]]
			*[[Tidal stream generator]]
			*[[Wind power]]
			*[[Bernoulli's equation]]
			*[[Betz limit]]
			*Or explore a [[Special:Random\| random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
			[[Category:Uploaded]]

Jmdonev: 1 revision imported

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Jmdonev at 05:57, 10 January 2016

2016-01-10T05:57:46Z

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[[Category:Done 2016-01-15]]
[[File:crossection.png|350px|thumb|right|Figure 1. The cross-sectional area of a cylinder is equal to the area of a circle if cut parallel to the circular base.<ref>''Created internally by a member of the Energy Education team.''</ref>]]
<onlyinclude>The '''cross-sectional area''' is the area of a two-dimensional shape that is obtained when a three-dimensional object - such as a cylinder - is sliced perpendicular to some specified axis at a point.</onlyinclude><ref>Math Captain. (January 9, 2016). ''Cross Section'' [Online]. Available: http://www.mathcaptain.com/geometry/cross-section.html</ref>

For example, the cross-section of a cylinder - when sliced parallel to its base - is a circle. Thus, the cross-sectional area of this slice is the area of a circle with the radius equal to the radius of the provided cylinder.

==Uses==
The cross-sectional area of some shape is important in many different applications. The cross-section of a series of pipes carrying [[water]] helps to determine the [[speed]] and [[pressure]] with which the water flows through the pipe, especially if there is some change in the cross-sectional area of the pipe at some point. Using [[Bernoulli's equation]], changes in the cross-sectional area of a pipe can be used to determine how other variables such as water pressure and speed must change to accommodate for this pipe change. As a result of this, cross-sectional area of pipes must be taken into account when building [[hydroelectric dam]]s - particularly the [[penstock]]s - for [[hydropower|hydroelectric power generation]].

Additionally, the cross-sectional area is important when looking at [[nuclear chain reaction|nuclear reaction]]s. The cross-section of some [[nucleus]] is used to define the effective size of a nucleus, and thus this value can be used to express the probability of some nuclear reaction taking place.<ref name="RE1">HyperPhysics. (January 9, 2016). ''Nuclear Reactions'' [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/nucrea.html</ref> As well, the [[neutron cross section]] is particularly important as it expresses how likely a reaction between a [[neutron]] and a target nucleus is, the basis for [[nuclear fission]].

==References==
{{reflist}}