What is the thickness of the disk of the Milky Way?
A) 100 light-years
B) 1,000 light-years
C) 10,000 light-years
D) 100,000 light-years
E) 1,000,000 light-years
B
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Waves on a String: A 2.31-kg rope is stretched between supports that are 10.4 m apart, and has a tension in it of 49.2 N. If one end of the rope is slightly tweaked, how long will it take for the resulting disturbance to reach the other end?
A. 0.699 s B. 0.720 s C. 0.664 s D. 0.615 s
One of the primary justifications given, in the textbook's opening section, for this course is
A) so that you can learn useful skills such as the ability to repair things around the house. B) to transmit our cultural heritage to your generation and to future generations. C) because more broadly educated people get better-paying jobs upon graduation. D) the evolutionary trend over billions of years has been toward increased awareness. E) people with a broad education are happier.
A car traveling at a steady 20 m/s rounds an 80-m radius horizontal unbanked curve with the tires on the verge of slipping
What is the maximum speed with which this car can round a second unbanked curve of radius 320 m if the coefficient of static friction between the car's tires and the road surface is the same in both cases? A) 160 m/s B) 80 m/s C) 70 m/s D) 40 m/s E) 30 m/s
Atmospheric sulfur pollution gives rise to
a. acid snow only. b. acid fog only. c. acid rain only. d. all of these.