2007-03-21 21:27:07 · 5 answers · asked by Lee D 1 in Science & Mathematics ➔ Physics
Yes! :)
When heat is added to most materials, the average amplitude of the atoms' vibration within the material increases. This, in turn, increases the separation between the atoms causing the material to expand. If the temperature change, delta T , is such that the material does not go through a phase change, then it can be shown that the change in the object's length, delata L, is given by the equation
(1) Delta L = alpha * initial length * delta T
where alpha is the linear expansion coefficient of the material
The linear expansion coefficient for various steels is between 13 - 18 (m/m.K x 10-6). The coefficient is positive and therefore length expansion will always occur with addition of heat.
2007-03-21 21:30:28 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Almost all steel bars expand on heating. Invar, an alloy of iron and nickel expands very little compared to normal iron and steel.
2007-03-22 04:44:58 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
All metals for that matter expand when subjected to heat. Only, they differ in their overall ability to expand. (see coefficients of 'expansion', if Im not mistaken)
2007-03-22 04:38:10 · answer #3 · answered by brian d 2 · 0⤊ 0⤋
virtually everything expands when heated.
Water going through the phase change solid to liquid being the only exception I know of. (Water does a lot of things that defy the norms of chemistry. when compared to similar molecules..)
2007-03-22 04:35:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋
yes the expand as when they become hot they consume more air and due to heat only they change into aqueous form.
2007-03-22 04:31:12 · answer #5 · answered by mythbuster 2 · 0⤊ 0⤋