Symbol question
The Lewis symbol 
would be
c
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Three point charges, q1, q2, and q3, are arranged so the potential energy for the pair q1 and q2 is 0.12 J and for the pair q2 and q3 is 0.23 J. If the total potential energy of the arrangement is 0.60 J, what is the potential energy of the pair q1 and q3?
A. 0.11 J B. 0.35 J C. 0.25 J D. 0.95 J E. Insufficient information is given for a unique answer
Interferometry
a. is used to improve the resolving power. b. decreases the chromatic aberration of a telescope. c. works only for large X-ray and ultraviolet telescopes. d. requires that radio telescopes be within a few hundred feet of each other. e. is none of the above.
Velocity Addition: You are moving at a speed 2/3 c toward Randy when shines a light toward you. At what speed do you see the light approaching you?
A. 1/3 c B. 2/3 c C. 4/3 c D. c
The shortest distance between two points in flat Euclidean space is a
A) straight line. B) geodesic. C) neither of these