Can I have a scientific explanation why and how metal expands?
2007-10-30 06:13:12 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
You have to get down to a molecular / atomic level,,as the metal heats up the atoms that make up the metal will begin to wobble,,,as they do the volume will expand very slightly,,,,the atoms will remain fairly stable and "wobble free" at 0 deg and will move around as the heat is applied,,,,the end product is expansion,the same effect applies to air and many gasses
2007-10-30 06:19:23 · answer #1 · answered by Anonymous · 1⤊ 0⤋
You really want a scientific explanation? Well, it's because the potential energy of atoms in a lattice displaced x from their equilibrium separation at 0K has a cubic term representing the asymmetry of the mutual repulsion of the atoms. When you integrate possible values of x, weighted according to their thermodynamic probability using the Boltzmann distribution function, to get the average displacement, this cubic term results in a mean value
Full equation for
2007-10-30 11:57:27 · answer #2 · answered by James P 5 · 1⤊ 0⤋
All atoms above absolute zero vibrate. As temperature increases, the kinetic energy of the atoms increase as well.
Since metals are situated in a crystalline lattice, the increased kinetic energy makes the overall lattice expand with heat.
2007-10-30 06:34:18 · answer #3 · answered by gebobs 6 · 0⤊ 0⤋
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2016-12-30 10:41:39 · answer #4 · answered by bockoven 3 · 0⤊ 0⤋
metal is stable at room temperature, hot and cold cause expansion and contraction, this is only noticeable when said piece is attached to something else...
railway lines have gaps to allow for this expansion, if they didnt the track would buckle in hot weather...
the expression brass monkeys...
well a brass monkey held the cannon balls onboard ship... this was a casting, when the weather was extremely cold, the monkey shrank and spat the balls out of the frame...
all metals expand and contract at different rates...
2007-10-30 06:28:29 · answer #5 · answered by Anonymous · 1⤊ 1⤋
Because non-linearity of inter-atomic force.
http://www.ph.hunter.cuny.edu/faculty/denboer/Presentations/2000%20nsls%20poster/sld003.htm
Atoms more easily move further apart, if given evough energy, than come close together.
2007-10-30 06:55:14 · answer #6 · answered by Alexander 6 · 1⤊ 0⤋