Which of these is NOT a characteristic of the solar nebula theory?
A) The ecliptic is the equator for the Sun.
B) All the planets should follow the ecliptic plane.
C) All the planets should orbit the Sun counterclockwise.
D) Larger planets should form closer to their star, where there is more debris.
E) Planets should rotate counterclockwise as well.
D
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Why are interstellar absorption lines so narrow compared to the width of lines which originate in the photospheres of stars?
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Satellites that lack craters are generally old, inactive bodies
Indicate whether the statement is true or false
A spear is thrown by you at a very high speed. As it passes, you measure its length at 1?2 its normal length. From this you conclude that the moving spear's mass must be
A. one-half its rest mass. B. twice its rest mass. C. four times its rest mass. D. None of these choices are correct.
How many electrons are present in the ion of the isotope of oxygen, 18O3- if oxygen has an atomic number of 8?
A) 18 B) 5 C) 8 D) 11