A thin aluminum plate has a surface area of 1500m at 20oC. What will be its surface area when it is cooled to -20oC? (Take the linear expansivity of aluminu...

Assessment: JAMB UTME - Physics - 1985 Subject: Physics

Question 1 Report

A thin aluminum plate has a surface area of 1500m at 20oC. What will be its surface area when it is cooled to -20oC? (Take the linear expansivity of aluminum to be 2.5 x 10-5k-1).
Answer Details
β  = A2 - A1

2 X 10-5 x 2.5 =  A 2 × 1.5 1.5 × ( − 20 − 20 )

A2 = 1.498m2

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