Which best describes the surface of Triton?
a. old, dark and cratered with a younger surface marked by ovoids
b. dark, dirty ice heavily pocked with craters
c. an icy crust free of craters with a liquid water ocean beneath it
d. an icy surface dominated by frozen nitrogen, methane, carbon monoxide and carbon dioxide
e. an icy surface dominated by frozen methane with a liquid ocean beneath it
d
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Compared to stars within the disk, halo stars
a. orbit at random inclinations to the galactic plane b. orbit at different speeds c. orbit with paths crossing d. All of the other choices are correct.
Large scale structures of the Universe include ___________
a. filaments b. voids c. walls d. All of the other choices are correct.
A mole of pure argon gas has _____________entropy than a mixture of a half mole of argon and a half mole of neon?
Fill in the blank(s) with the appropriate word(s).
Two charged bodies separated by a distance d exert an electrical force on each other. The distance d is doubled. The electrical force on each body now
a. decreases by 1/4. b. decreases by 1/2. c. stays the same. d. increases by 2 times. e. increases by 4 times.