/°f x - example: calculate the thermal expansion/contraction of a steel pipe feet long installed at °f ambient temperature, when chilled water at °f is running through it. find αααα at °f: ( - ) / ( - ) = (α - ) / ( - ) solving for αααα ⇒⇒⇒⇒ αααα = ∆l = l � α � ∆t ∆l = ( ft. x in./ft.) ( x - in./in....