A 2.0-? resistor is in series with a parallel combination of 4.0 ?, 6.0 ?, and 12 ?. What is the equivalent resistance of this combination?
A) 24 ?
B) 12 ?
C) 4.0 ?
D) 1.8 ?
E) 2.7 ?
C
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A spherically symmetric planet has four times the earth's mass and twice its radius. If a jar of peanut butter weighs 12 N on the surface of the Earth, how much would it weigh on the surface of this planet?
A) 3.0 N B) 6.0 N C) 12 N D) 24 N E) 36 N
Each of the following lists two statements. Which two are the basic premises for the special theory of relativity?
A) (1) The laws of nature are the same for everyone. (2) The speed of light is the same for everyone. B) (1) The laws of nature are relative. (2) The speed of light depends on your viewpoint. C) (1) You can't go faster than the speed of light. (2) Time is different for different people. D) (1) Everything is relative. (2) You can never really tell who is moving.
Graphical Analysis: The area under a curve in a velocity versus time graph gives
A. acceleration. B. velocity. C. displacement. D. position.
Galaxies have stars of varying ages, but the stars of elliptical galaxies are typically....
A. Population I. B. Population II. C. blue-white. D. contained in the spiral disk.