Which kind of interstellar spacecraft would require the crew to be placed in suspended animation, perhaps for thousands of years?
A) solar sail
B) interstellar ark
C) matterantimatter rocket
D) nuclear rocket
B
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Which source is the most luminous (or would be, if all its energy were output in visible light)?
a) The Sun. b) A quasar. c) A nuclear power plant. d) A gamma-ray burst. e) A supernova.
Planet Zero has a mass of 4.0 × 10^23 kg and a radius of 2.0 × 10^6 m. A 10-kg space probe is launched vertically from the surface of Zero with an initial kinetic energy of 8.0 × 10^7 J. What maximum distance from the center of Zero is achieved by the probe?
a. 3.2 × 10^6 m b. 4.0 × 10^6 m c. 6.0 × 10^6 m d. 5.0 × 10^6 m e. 2.5 × 10^6 m
Dez pours water (n = 1.333) into a container made of crown glass (n = 1.52). The light ray in glass incident on the glass-to-liquid boundary makes an angle of 30.0° with the normal. Find the angle of the corresponding refracted ray
a. 19.2° c. 55.5° b. 34.8° d. 27.2°
Most of the hot, young blue stars lie in the ________ of our Galaxy
A) bulge B) globular clusters C) central bar D) spiral arms E) halo