The solar system consists mostly of
A) the Sun.
B) the planets.
C) the Sun and the planets combined.
D) empty space.
Answer: A
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If the Earth's period of rotation were halved, but the period of revolution about the Sun stayed the same,
a. the night would be twice as long. b. the night would be half as long. c. the year would be half as long. d. the year would be half as long. e. the length of the day would be unchanged.
While on the main sequence a star's primary energy source comes from
a. nuclear fusion. b. nuclear fission. c. gravitational potential energy. d. magnetic fields.
If a vector pointing upward has a positive magnitude, a vector pointing downward has a negative magnitude
A) True B) False
A car is traveling along a freeway at 65 mph. What is the linear speed, relative to the highway, of each of the following points on one of its tires? (a) the highest point on the tire (b) the lowest point on a tire (c) the center of the tire
What will be an ideal response?