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A brass disc fits simply in a hole of steel plate. The disc from the hole can be lossenned if the system is
*First heated then cooled or
*First cooled then heated
*Is heated
*Is cooled

Asked by Umesh 27th October 2017, 10:43 AM
Answered by Expert
Answer:
Thermal expansion coefficient of brass is ˜ 20 × 10-6 /°C whereas that of steel is ˜ 15 × 10-6 /°C.
 
Hence brass expands/shrinks faster than steel.
 
So the brass disc from the hole of steel plate can be loosened if the system is cooled.
Answered by Expert 27th October 2017, 1:01 PM
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