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Physics Past Questions and Answers

Topic: Definition and determination of area expansivities

Jamb Physics Questions - Definition and determination of area expansivities

Question 1:
A thin aluminum plate has a surface area of 1500m[/sup] at 20[sup]oC. 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).
  • A 1.503m<sup style='font-size: smaller;'>2</sup>
  • B 1.500m<sup style='font-size: smaller;'>2</sup>
  • C 1.498m<sup style='font-size: smaller;'>2</sup>
  • D 1.497m<sup style='font-size: smaller;'>2</sup>
  • E 1.490m<sup style='font-size: smaller;'>2</sup>
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