As the solar nebula contracts due to gravitation, the cloud
A) spins faster.
B) expands.
C) becomes more spherical in shape.
D) changes direction of motion.
E) begins to cool.
A
Physics & Space Science
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If gravity between the Sun and Earth suddenly vanished, Earth would move in
A) a curved path. B) an outward spiral path. C) an inward spiral path. D) a straight-line path.
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Why do we use fuses?
a. to eliminate shock hazards b. to prevent fires c. to save on the cost of electricity d. to store charge
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A planet whose distance from the Sun is 3 AU would have an orbital period of how many Earth-years?
A) 3 B) C) D) 9 E) 81
Physics & Space Science
The gas density in an emission nebula is typically about how many particles per cc?
A) dozen B) hundred C) thousand D) hundred thousand E) million
Physics & Space Science