Potential of Point-Charges: Two very small +3.00-?C charges are at the ends of a meter stick. Find the electric potential (relative to infinity) at the center of the meter stick. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 0.00 V
B. 2.70 × 104 V
C. 5.40 × 104 V
D. 1.08 × 105 V
Answer: D
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Where have scientists begun a concerted search for life outside of Earth?
A) the Moon B) Venus C) Mars D) Jupiter E) Titan
The total mass of all the asteroids in the asteroid belt combined is
A) less than that of any terrestrial planet. B) about the same as that of Earth. C) about twice that of Earth. D) about the same as that of Jupiter. E) more than that of all the planets combined.
Instructions: On occasion, the notation 
= [A, ?] will be a shorthand notation for 
.
?
Exhibit 3-4
The diagram below shows the path taken by a sailboat tacking sideways because it cannot sail directly into the wind.
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?
Use this exhibit to answer the following question(s).
Refer to Exhibit 3-4. The total distance it travels is
A. 1000 m.
B. 1732 m.
C. 2000 m.
D. 6298 m.
E. 8000 m.
A solar eclipse that occurs when the moon's umbra reaches Earth's surface is called
a. a total solar eclipse. b. a partial solar eclipse. c. an annular solar eclipse. d. a penumbral solar eclipse. e. an umbral solar eclipse.