The Sun lies ________ the disk of our Milky Way Galaxy.
A. about half of the way out in
B. in the halo above
C. about one-tenth of the way out in
D. at the center of
Answer: A
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Answer the following statement true (T) or false (F)
In England in the Middle Ages an extensive system of canals was used for transportation. Some of these canals crossed over canyons by flowing over bridges (viaducts). Suppose that a heavily loaded barge crossed over such a waterway bridge
A) The force downward on the bridge would increase because of the added weight of the barge. B) The force on the bridge would not change when the barge passed over. C) The force on the barge would become less because some water would be squeezed off of the bridge. D) The force on the bridge would become less because of the buoyancy effect of the water on the barge. E) Whether or not the force on the bridge would increase or decrease would depend on whether the water was flowing or stationary.
What event marks the birth of a star, and what event marks its death?
What will be an ideal response?
The atmosphere of Saturn is composed mostly of
A) methane and ammonia. B) carbon dioxide and ethane. C) hydrogen and helium. D) hydrogen sulfide and ammonia. E) nitrogen and oxygen.