Difference between revisions 5759877 and 5759900 on simplewiki

A '''binding energy''' is the net negative [[potential energy]] (''i.e.'', the net energy debt) pulling a bound system together.<ref>Young, Hugh D.; Freedman, ‎Roger A. [https://www.google.co.uk/search?newwindow=1&tbm=bks&q=%22has+a+net+negative+potential+energy%22 University Physics]. Addison-Wesley, 2000, p. 736. "A crystal of table salt is made of ions of sodium (Na<sup>+</sup>) and chlorine (Cl<sup>−</sup>) and has a net negative potential energy. To dissolve salt in water, energy must be added to separate the ions."</ref><ref>[[w:Frank Shu|Shu, Frank]]. [https://books.google.co.uk/books?id=v_6PbAfapSAC&pg=PA66&dq=%22more+binding+energy+means+the+system+is+more+bound—has+greater+negative+energy%22 The Physical Universe: An Introduction to Astronomy]. University Science Books, 1982, p. 66. "Remember, more binding energy means the system is more bound—has greater ''negative'' energy."</ref> Conversely, an '''unbinding energy''' is the positive actual energy required to disassemble a bound system into separate partsthat must be added to a bound system in order to cancel out the system's net negative potential energy.<ref>Pople, Stephen. [https://books.google.co.uk/books?id=pjIW6QRlugsC&pg=PA100&dq=%22unbinding+energy%22 Advanced Physics Through Diagrams]. OUP, 2001, p. 100. “The term ‘binding energy’ is rather misleading. ‘Unbinding energy’ would be better. 28.3 MeV is the energy needed to unbind the nucleons in helium-4.”</ref>

==General idea==
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==External links==
*[http://hyperphysics.phy-astr.gsu.edu/hbase/nucene/nucbin.html Nuclear Binding Energy]

{{DEFAULTSORT:Binding Energy}}
[[Category:Basic physics ideas]]
[[Category:Cosmology]]
[[Category:Energy]]