Volume expansion:
V = L3 = L03(1+aDT)3 = V0(1+3aDT+...) => DV/V = 3aDT You could also write a formula with the coefficient of volume expansion, g, as:
DV/V = gDT Comparing the last two formulas then yields:
g = 3a
In both of the above derivations we were able to neglect terms
higher than linear in a, because
a is so small => aDT
« 1
If, however, you are given the coefficient of volume expansion, g, then the formula you need to use is: