Author Question: The F-ring is held in place around Saturn by two shepherd moons. Indicate whether the statement ... (Read 23 times)

lindiwe · **on:** Jul 27, 2018

The F-ring is held in place around Saturn by two shepherd moons.

Indicate whether the statement is true or false

Question 2

Which observation(s) support(s) the idea that dark energy accounts for about 70 of the total mass-energy density of the universe?

A) This is just the right amount of a repulsive force to explain the observed acceleration in the expansion of the universe.
B) This is just the right amount of energy, in addition to the observed matter and dark matter, to explain the pattern of temperatures in the cosmic microwave background.
C) It is the right amount of energy to make the universe geometrically flat, which is mathematically easier to work with than a curved geometry.
D) A and B
E) B and C