In composition, mass, and density, Jupiter is most like:
A) a huge comet.
B) a gigantic asteroid.
C) the Sun.
D) a huge Kuiper belt Object.
E) a large terrestrial planet.
C
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Three 2.50-?C charges are placed on tiny conducting spheres at the ends of 1.00 m-long strings that are connected at 120° angles as shown below. The magnitude, in N, of the force on the knot at the center is
?
?
A. 0. B. 3.75 × 10?2. C. 5.63 × 10?2. D. 6.50 × 10?2. E. 7.50 × 10?2.
An automobile of mass 2 500 kg moving at 50.0 m/s is braked suddenly with a constant braking force of 8 500 N. How far does the car travel before stopping?
a. 7.35 m b. 368 m c. 184 m d. 551 m e. 19.2 m
Compared to our Sun, most stars in the halo are
A) old, red, and bright and have fewer heavy elements. B) old, red, and dim and have many more heavy elements. C) young, red, and dim and have fewer heavy elements. D) old, red, and dim and have fewer heavy elements. E) young, blue, and bright and have many more heavy elements.
If you drove day and night without stopping for one year without exceeding the legal highway speed limit in the United States, the maximum number of miles you could drive would be closest to:
a. 8700. b. 300000. c. 500000. d. 1000000. e. 32000000.