Space-time will be flat if
A) the universe is expanding.
B) the universe is accelerating.
C) the average density of the universe is equal to the critical density.
D) the universe is finite.
E) the universe is homogeneous and isotropic.
Correct Answer:
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Q15: The cosmological principle states that the universe
Q16: If the universe is closed and finite,
Q17: The _ view of the universe is
Q18: The Hubble time is
A) the time it
Q19: The assumption of homogeneity states that
A) the
Q22: If galaxy A is four times more
Q22: What is the fate of an open
Q23: The age of the universe can be
Q24: "Seeds" around which galaxies, clusters and walls
Q25: The flatness problem states that
A) the density
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