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The following physics revision questions are provided in support of the physics tutorial on Thermal Expansion. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Thermal Expansion tutorials. The Thermal Expansion calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.
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1) A long nickel bar elongates by 3 mm when its temperature increases by 130 K. What was the original length of the bar if the coefficient of linear expansion for nickel is 13 × 10-6 K-1?
Correct Answer: C
2) The coefficient of thermal expansion for nylon is 100 × 10-6 K-1. How many square centimeters a nylon cloth of area equal to 0.4 m2 will shrink if the environment's temperature decreases by 20°C?
Correct Answer: D
3) A bimetallic strip (at 20°C) made of one platinum and one gold bar of equal lengths is shown in the figure below.
The linear coefficient of thermal expansion for gold is 14.2 × 10-6 K-1 and that of platinum is 9 × 10-6 K-1. What is the shape of the bimetallic strip when it cools down to -40°C?
Correct Answer: C
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