A Square Plate Has an Area of 29 $\degree$ CIt Will Be Used in a Low Temperature Experiment at 20.0

question 4

Multiple Choice

A square plate has an area of 29.00 cm² at 20.0 $\degree$ 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 $\degree$ C for it to have the correct area at 10.0 K? (The coefficient of linear expansion is 10 *10 ^{- 6} ( $\degree$ 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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