What is the direction of the electric field vector 
at point P in the situation shown below? (Assume that the balls are actually point particles, they are equally spaced, and that the negative particles are equidistant from P.)
A. A
B. B
C. C
D. D
E. zero
F. Other
G. AA
H. BB
I. CC
J. DD
E. zero
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Is the actual size of the universe larger than 14 billion light years?
A) The observable universe is 14 billion light years in each direction, so the actual universe is greater than 14 billion light years across. B) We do not have enough information to know this. C) The universe must be exactly equal in size to its age, so it must not be larger than 14 billion light years across in size. D) It is only 14 billion light years across to us; to an observer 10 billion light years away, it is smaller.
What was the purpose of the IAU establishing 88 official constellations?
a. To allow ancient stories of each constellation to be preserved b. To name all constellations the same across any culture c. To identify which constellation was created by which culture d. To define boundaries for constellations including every part of the sky e. To include additional, fainter stars within a constellation
The parallactic angle is the total shift observed over a six-month interval
Indicate whether the statement is true or false
The "close encounter hypothesis" suggested that the planets formed after a near-collision between our Sun and another star. If this hypothesis were correct, which of the following would be true?
A) Planetary systems would be very rare. B) Planetary systems would be very common. C) Most planetary systems would have their jovian planets closer to their stars and their terrestrial planets farther from their stars. D) Most planetary systems would have the same number of planets as our own. E) All planetary systems would be at least 4 billion years old.