Velma passes Mort at a high speed. Velma and Mort each have identical light-clocks. Mort and Velma both observe both clocks to "tick" simultaneously at 12 noon on both clocks. Mort observes that Velma's next tick occurs
A) only after the second drink.
B) after his own clock ticks.
C) before his own clock ticks.
D) before or after or at the same time as his own tick, depending on Velma's precise speed.
E) at the same time as the tick on his clock.
B
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Reactance: A simple ac circuit consists of an inductor connected across the terminals of an ac power source. If the frequency of the ac source is decreased by a factor of four, what happens to the reactance of the inductor?
A. It decreases by a factor of four. B. It decreases by a factor of eight. C. It increases by a factor of two. D. It increases by a factor of four. E. It increases by a factor of eight.
Where is the center of mass of a binary system consisting of two stars with different masses?
A) the center of the more massive star B) the center of the less massive star C) the point halfway in between the two stars D) a point between the two stars that is closer to the more massive star E) a point between the two stars that is closer to the less massive star
The air in your classroom has
A) mass. B) weight. C) energy. D) all of the above E) none of the above
A solid sphere, a solid cylinder, and a hoop all have the same mass and radius. Each are sent down identical inclined planes starting from rest. Their kinetic energies at the bottom of the incline are Ksphere,Kcylinder, and Khoop. Which of the following is true?
A. Ksphere>Kcylinder B. Khoop>Ksphere C. Khoop>Kcylinder D. Kcylinder>Khoop E. No answer above is correct.