Rhys has to sew a button on his shirt, but he finds that he can't thread the needle (i.e. the cotton thread is too thick for the eye of the needle).After studying thermal physics, he decides he should heat the needle to make it expand so that the cotton thread can fit through. Given that thethread was 8% too thick for the eye at room temperature (22°C), to what temperature (in Celsius) should he bring the needle for the thread tofit? (Given asteel = 10 x 10-6 K-1.)

As the needle is made up of steel, we can use the coefficient of linear expansion to calculate the…

Answered: Rhys has to sew a button on his shirt,…

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