The focal point of a satellite in orbit about the Sun is
A) inside the Sun.
B) outside the Sun.
C) both of these
D) neither of these
Answer: C
Physics & Space Science
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Suppose a planet with mass M has a moon with mass M. Where is the system’s center of mass? Refer to the diagram below. 
A. A B. B C. C D. D E. E
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In an astronomical telescope the secondary mirror is
a. concave. b. convex. c. spherical. d. plane.
Physics & Space Science
Jane drove her car from Columbus, Ohio to
Cleveland, Ohio. She traveled a total distance of 140 mi in 2.8 hours. Her average speed was a) 50 mi/h b) 0.02 mi/h c) 56 mi/h d) 350 mi/h
Physics & Space Science
An 800 V/m electric field is directed along the +x-axis. If the potential at x = 0 m is 2000 V, what is the potential at x = 2 m?
A) 200 V B) 400 V C) 600 V D) 800 V E) 1000 V
Physics & Space Science