A copper alloy wire of length 2.0 m, cross sectional area 7.1 × 10^-6 m2, and Young's modulus 11 × 10^10 N/m2, has a 200-kg load hung on it. What is its increase in length? (g = 9.8 m/s2)
a. 0.50 mm
c. 2.5 mm
b. 1.0 mm
d. 5.0 mm
D
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