A particle with a mass of 3.0 kg is accelerated to a speed of 0.80. The mass of this particle is now:
A. Greater than 3.0 kg
B. Less than 3.0 kg
C. Still 3.0 kg
C. Still 3.0 kg
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Where do we observe black holes?
A. In orbit around stars in binary systems. B. In the center of the Milky Way Galaxy. C. In the centers of elliptical galaxies. D. In quasars. E. All of the above.
If you are driving at 20 m/s and slam on your brakes and skid at 0.5g to a full stop, the skidding time is about
A) 3 s. B) 4 s. C) 5 s. D) 6 s. E) greater than 6 s.
Which statement illustrates the fact that two different theories can both agree with the same set of observations?
A) Nonsense--it is impossible for two different theories to both be correct. B) the theories of Ptolemy and Copernicus, before Tycho made his observations C) the theories of Copernicus and Kepler, after Tycho made his observations D) the theories of Galileo and Kepler E) the Earth-centered circular orbit theory of the early Greeks, and the later theory of Ptolemy
What is different about locating images in convex mirrors compared to locating images in concave mirrors?
a. Among many differences, ray diagrams do not work for convex mirrors. b. Convex mirrors require more rays for a minimum ray diagram. c. Everything is the same except that the focal point is located behind the mirror. d. Because convex mirrors have no focal point, rays must be constructed differently. e. Because convex mirrors have no optic axis, rays must be constructed differently.