Many pulsars are not associated with supernova remnants
a. True
b. False
Indicate whether the statement is true or false
True
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The narrowness of the rings of Uranus and Neptune is believed to be caused by
a. gravitational interactions between ring particles. b. a spiral density wave which confines them. c. the magnetic field which holds them in place. d. the smaller mass of Uranus and Neptune as compared to that of Saturn. e. small shepherd moons that orbit near the rings.
If it takes three golf balls to equal the mass of one tennis ball, what mass of tennis balls do you need to equal the number of golf balls in one kilogram of golf balls?
A) 1/3 of a kg B) 30 kg C) 1 kg D) 3 kg E) 6 kg
Which one of the following is not a characteristic of a simple two-lens astronomical refracting telescope?
A) The angular size of the final image is larger than that of the object. B) The final image is virtual. C) The objective forms a virtual image. D) The final image is inverted.
A conducting ring is placed such that it is lying flat in the x-y plane. A magnetic field exists in the +z direction, and its strength is decreasing with time. Which of the following occurs?
A. No current is induced in the ring. B. A current is induced, in the counter-clockwise direction, as viewed from above the x-y plane. C. The situation is unclear because we do not know the initial conditions. D. A current is induced, in the clockwise direction as viewed from above the x-y plane.