A 120-V rms voltage at 60.0 Hz is applied across an inductor, capacitor and a 100-? resistor in series. If the maximum value of the current in this circuit is 1.60 A, what is the rms value of the current in this circuit?
A) 1.60 A B) 2.66 A C) 1.82 A D) 2.26 A E) 1.13 A
E
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A person has a mass of 45 kg. How much does she weigh on the Moon, where g = 1.62 m/s2?
A) 45 N B) 73 N C) 7.4 N D) 220 N E) 440 N
Friction: You push downward on a trunk at an angle 25° below the horizontal with a force of 750 N. If the trunk is on a flat surface and the coefficient of static friction between the surface and the trunk is 0.61, what is the most massive trunk you will be able to move?
A. 81 kg B. 93 kg C. 73 kg D. 112 kg
When the sum of the external forces and the sum of the external torques on a body are both zero, we can conclude that
A. the body is moving at constant velocity but is not rotating. B. the body is rotating at constant angular velocity but has no linear velocity. C. the body has neither linear nor angular velocity. D. the body may have constant linear or angular velocity, but not both simultaneously. E. the body may have constant linear or constant angular velocity, or both simultaneously.
What are the very cold (about 20 K), dense clouds of gas thought to be the most massive objects in the Galaxy called?
A) emission nebulae B) absorption clouds C) dust clouds D) molecular clouds E) reflection nebulae