If a star is found with five planets orbiting it, and a process like that described in the solar nebula theory formed the planets, which of the planets would be expected to have the greatest uncompressed density?
a. The one farthest from the star.
b. The one with the greatest mass.
c. The one with the greatest radius.
d. The one closest to the star.
e. The one that has liquid water on its surface.
D
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Two strings are, respectively, 1.00 m and 2.00 m long. Which of the following wavelengths, in meters, could represent harmonics present on both strings?
a. 0.800, 0.670, 0.500 b. 1.33, 1.00, 0.500 c. 2.00, 1.00, 0.500 d. 2.00, 1.33, 1.00 e. 4.00, 2.00, 1.00
Which of the following statements is true of the spectral sequence?
A) It is classified in groups labeled A through Q. B) M stars are cooler and fainter than L dwarfs. C) Y dwarfs are a class of objects with temperatures above 500 K. D) O stars are the hottest, and M stars are the coolest.
Wave interference occurs for waves of
A) sound. B) light. C) water. D) all of the above E) none of the above
A rock is thrown vertically into the air. At the top of its path, its acceleration is
A) zero. B) 10 m/s2. C) between 0 and 10 m/s2. D) greater than 10 m/s2.