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A Piece of Brass 0 ∘\circ C and Is Stretched by a Force

Question 31

Multiple Choice

A piece of brass 0.12 m2 in cross sectional area is cooled by 30 ∘\circ C and is stretched by a force.If the fractional change in length is 1.12 * 10-3,what is the magnitude of the force? ( α\alpha Brass = 19 * 10-6 C-1,YBrass = 9.0 * 1010 N/m2)


A) 18 * 106 N
B) 52 * 105 N
C) 74 * 105 N
D) 78 * 106 N
E) 95 * 105 N

Correct Answer:

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