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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The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H.
When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
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
Distant dark-colored hills appear blue due to the color of the
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.
Some power plants extract energy from the warm ocean currents. A major disadvantage to these power plants is that
A. the amount of heat released to the environment is unacceptable. B. the cost of warm ocean water is quite high. C. the efficiency is quite low. D. there is no low temperature reservoir.