Asked Dec 18, 2019

A piece of steel expands 10 cm when it is heated from 20 to 40°C. How much would it expand if it was heated from 20 to 60°C?


Expert Answer

Step 1

Write the expression for linear expansion for the first case and substitute the known values.


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ΔΙ-ΔΤ (10 cm) -α(400C-20' C) (10 cm) α- (20°C) = 0.5 cm/°C

Step 2

Write the expression for linear expansion for the s...


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Al' = aAT' = (0.5 cm/°C)(60°C– 20°C) = 20 cm


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Heat Transfer

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