Answer:
It's an Angle of incidence that provides a 90° angle but is also refracted at the same time. it's used to find the water-air boundary (which is 48.6 degrees). in addition, its an angle of incidence value.
Answer:
B :)
Explanation:
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Answer:
c it is not accelerating on it's on but gravity pulls it there for velocity increases.
By Hubble theory in which universe is expanding,