The Other Frame is moving in the +x direction with x-velocity ? = 0.25 with respect to the Home Frame. The two-observer space time diagram in figure R5.9 shows the diagram t and x axes of the Home Frame and the diagram t? axis of the Other Frame. Which of the choices in that Figure best corresponds to the diagram x? axis?
Answer: C
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Charge is distributed uniformly on the surface of a spherical balloon (an insulator). A point particle with charge q is inside. The electrical force on the particle q is greatest when:
A) it is just outside the surface of the balloon B) it is at the center of the balloon C) it is halfway between the balloon center and the inside surface D) it is anywhere inside (the force is same everywhere and is not zero) E) it is anywhere inside (the force is zero everywhere)
If you are located in the Northern Hemisphere, which of the following correctly describes a relationship between the sky and your location?
A) The altitude of the north celestial pole equals your latitude. B) The altitude of the celestial equator equals your latitude. C) The altitude of the north celestial pole equals your longitude. D) The longitude of the north celestial pole is circumpolar, and therefore crosses your zenith at the meridian.
A plot of the temperature versus the energy per kg added to a piece of ice as it goes from below freezing at ?10°C to becoming steam at 110°C consists of straight lines, some horizontal and some with an upward slope. What do the upward slopes represent?
a. specific heats b. reciprocals of specific heats c. latent heats d. reciprocals of latent heats
If Earth's axis were tilted at 40°, the seasons of the year would
a. be shorter. b. be harsher. c. be longer. d. not change. e. be milder.