A Square Plate Has an Area of 29

question 39

Multiple Choice

A square plate has an area of 29.00 cm² at 20.0°C. It will be used in a low temperature experiment at T = 10.0K where it must have an area of 28.00 cm². What area must be removed form the plate at 20.0°C for it to have the correct area at 10.0 K? (The coefficient of linear expansion is 10 × 10−⁶ (°C) −¹.)

• A) 0.079 3 cm²
• B) 0.159 cm²
• C) 0.238 cm²
• D) 0.841 cm²
• E) 0.921 cm²

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