When we look toward the constellation Sagittarius, we are looking
A) at the galaxy's central bulge.
B) toward Polaris, the "Pole Star."
C) toward the Winter Triangle.
D) out toward the outer Milky Way.
A) at the galaxy's central bulge.
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Which produces a brighter image? Choose the best answer
a. a small-diameter telescope b. a large-diameter telescope c. A very small light collector d. None of the other choices are correct.
Describe the impact the discovery of extrasolar planets has had for understanding the origin of our own Solar System
What will be an ideal response?
Suppose a certain type of atom had just 5 different energy levels. How many different frequencies could be emitted by a gas composed of atoms of this type?
A) 10 B) 4 C) 25 D) 5 E) an infinite number
Two point charges are 4 cm apart. They are moved to a new separation of 8 cm. By what factor does the resulting mutual force between them change?
a. 1/4 c. 1/2 b. 2 d. 4