A brass disc fits snugly in a hole in a steel plate. Should you heat or cool this system to losen the disc from the hole ? given that alpha _b gt alpha _Fe.

A brass disc fits snugly in a hole in a steel plate. Should you heat o

1.	A brass disc fits snugly in a hole in a steel plate. Should you heat or cool this system to losen the disc from the hole ? given that alpha _b gt alpha _Fe.
Answer» Solution :The TEMP, coefficient of linear EXPANSION for brass is greater than that for steel. On cooling the disc shrinks to a greater extent than the HOLE, and hence brass disc GETS lossened.