You observe a spiral galaxy with a large central bulge and tightly wrapped arms. It would be classified a(n)
A) S0. B) E7. C) Sa. D) Sc. E) Sb.
C
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Which of the following is not a good reason to place an observatory on a remote mountain to?
A) reduce the impact of light pollution B) reduce the twinkling caused by Earth's atmosphere C) allow study of infrared light D) allow observations at ultraviolet and x-ray wavelengths
Probably the next satellite to get turned into ring debris will be Neptune's backward moon, Triton
Indicate whether the statement is true or false
An object floats with half its volume beneath the surface of the water. The weight of the displaced water is 2000 N. What is the weight of the object? The density of water is 1000 kg/m3
A) 1000 N B) 4000 N C) 2000 N D) It cannot be determined because we do not know the volume of the object.
Which force did Kepler believe moved the planets around the Sun?
a. electricity b. inertia c. light from the Sun d. gravity e. magnetism