A square plate has an area of 29.00 cm2 at 20.0C. 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 20.0C 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
Question 2
Angela claims that she wears a cylindrical-shaped hollow gold bracelet because it expands less than a solid one with a change in temperature. Clarissa claims that a cylindrical-shaped solid gold bracelet expands less than a hollow one. Which one, if either, is correct?
a. Angela, because the bracelet expands outward on its outer surface and inward on its inner surface. b. Clarissa, because the bracelet expands outward on its outer surface and inward on its inner surface. c. Angela, because the inner circumference does not change, but the outer circumference expands.
d. Clarissa, because the inner circumference does not change, but the outer circumference expands.
e. Neither, because both the inner and outer circumferences increase in length.
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