If two copper wires of the same length have different thickness, then the thicker wire has
A) more resistance.
B) less resistance.
C) both the same
Answer: B
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A nearsighted person has a far point that is 4.2 m from his eyes. What focal length lenses must he use in his contact lenses to allow him to focus on distant objects?
A) -4.2 m B) 4.2 m C) -5.2 m D) 5.2 m E) 4.8 m
Two strings are respectively 1.00 m and 2.00 m long. Which of the following wavelengths, in meters, could represent harmonics present on both strings?
a. 0.800, 0.670, 0.500 b. 1.33, 1.00, 0.500 c. 2.00, 1.00, 0.500 d. 2.00, 1.33, 1.00 e. 4.00, 2.00, 1.00
You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?
a. 45° b. 23.4° c. 39° d. 51° e. The answer depends on the day of the year.
Which one of the following is TRUE?
A) Most elliptical galaxies contain only young stars. B) Barred spiral galaxies have similar properties to normal spirals, except for the "bar" feature. C) Galaxy collisions destroy most of the stars in the galaxies involved. D) Irregular galaxies rarely have star formation taking place in them. E) Most galaxies appear to be approaching the Milky Way Galaxy.