A major advantage of a Newtonian reflector over a refractor is:
A) its compact size.
B) the elimination of chromatic aberration.
C) there are only two lenses to grind.
D) the central hole in the mirror is smaller.
E) the elimination of the secondary mirror.
B
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You and your friend put the palms of your hands together and push equally on each other so your hands don't move. Which law(s) does this follow? Choose the best answer. I. Newton's first II. Newton's second III. Newton's third IV. Newton's law of gravitation
a. I, III b. II, IV c. I, II, III, IV d. III
Consider again the objects you ranked by distance in Part A. Suppose each object emitted a burst of light right now. Rank the objects from left to right based on the amount of time it would take this light to reach Earth, from longest time to shortest time.
Compared to the volume of its nucleus, the volume of an atom is about
A) the same. B) a thousand times greater. C) a million times greater. D) a billion times greater. E) a trillion times greater.
Which of the jovian moons is the largest and also the largest moon in the solar system, even bigger than Mercury?
A) Titan B) Triton C) Ganymede D) Callisto E) Umbriel