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... position of the half-bar, its new position, and the distance x that one end is displaced form a right triangle, with a hypotenuse of length A , one side of length A , and the other side of length... coefficient of linear expansion of aluminum, and ∆T is the temperature increase, then the change in the volume of the cup is ∆Vc = 3αa Vc ∆T See Eq 1 8-1 1 If β is the coefficient of volume expansion for... glycerin then the change in the volume of glycerin is ∆Vg = βVc ∆T Note that the original volume of glycerin is the same as the original volume of the cup The volume of glycerin that spills is ∆Vg −