Sandra W.

asked • 02/08/22

What is the °C?

A machinist wishes to insert a brass rod with a diameter of 6 mm into a hole with a diameter of 5.993 mm. By how much would the machinist have to lower the temperature (in °C) of the rod to make it fit the hole?


What is the °C?


My textbook is good, but I try the way they speak but my answers are always wrong. 20x the wrong answer.

Rajai A.

Hi. calculate A0 before expansion then A after expansion ,use A=pi r square. then use the equation. A=A0 ×( 1 + beta × delta T ) beta is coefficient of surface expansion which is equal approximately double of longitudal (linear) expansion coefficient. delta T should be negative.
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02/08/22

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