A meter stick with a mass of 89.5 g is being supported at the 50.0 cm mark by a pivot that is 1.00 cm above the center of mass of the meter stick. The moment of inertia of the stick about that point is 0.00746 kg? m2
What is the period of oscillation of this system? A)
2.01 s
B)
2.41 s
C)
5.79 s
D)
2.89 s
E)
4.02 s
C
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A. A. B. B. C. C. D. D. E. E.
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) 6.5 × 10-4 m B) 5.6 × 10-6 m C) 6.5 × 10-6 m D) 6.5 × 10-5 m E) 5.6 × 10-5 m
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A) atmosphere between the observer and the dark hills. B) selectively reflected light that reaches a distant observer. C) reflected light that survives scattering. D) sky that is reflected off the hills.
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