Young's Modulus: A vertical 30-cm steel rod, 1.0 cm in diameter, supports a 300-kg mass. What is the change in length of the rod caused by this mass? Young's modulus for steel is 2.0 × 1011 N/m2.
A. 5.6 × 10-5 m
B. 6.5 × 10-5 m
C. 5.6 × 10-6 m
D. 6.5 × 10-6 m
E. 6.5 × 10-4 m
Answer: A
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