If the Sun is in front of a constellation of the Zodiac (for example, Virgo), it takes about one ________ to pass through all the Zodiac constellations and once again be in front of the same constellation.
Fill in the blank(s) with the appropriate word(s).
year
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Scientific Notation: What is the result of the calculation (0.410 + 0.021) × (2.20 × 103)?
A. 880 B. 946 C. 948 D. 950
You will see that the Universe is almost 14 billion years old. That means that we see the most distant galaxies as they were when the Universe was:
A.) A few thousand years old. B.) 1-2 million years old. C.) 1-2 billion years old. D.) 4-6 billion years old. E.) 13 billion years old.
When we say work is done against a force, we mean the force does
a. none of the work. b. positive work. c. negative work. d. zero work.
Potential of Point-Charges: Point charges +4.00 ?C and +2.00 ?C are placed at the opposite corners of a rectangle as shown in the figure. What is the potential at point B due to these charges? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. 8.99 kV B. 11.2 kV C. 89.9 kV D. 899 kV E. 112 kV