(adsbygoogle = window.adsbygoogle || []).push({}); stuck with a problem....on linear thermal expansion of solids

1. The problem statement, all variables and given/known data

I just read a problem 2day...it's on linear thermal expansion of soild...can anyone guide me through....it says..." A sqaure ABCD is made with two different metals...the coefficient of thermal expansion of the metal which made AB & CD is alpha (don't know how to type alpha) & the same of the metal which made BC & AD is beta (??)..Now if the temperature of the system is increased by t. then prove the angle between the diagonals will change by (alpha - beta).t/2 " ?????

can u pls help....

thanks

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Stuck with a problem on linear thermal expansion of solids

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