Gravity becomes separate from the other forces at the:
A) decoupling Event, about a million years after the Big Bang.
B) end of the Planck Era, about 10-43 seconds after the Big Bang.
C) end of the Inflationary Epoch, about 10-32 seconds into creation.
D) beginning of particle production, about .0001 seconds into the universe.
E) end of electron production, about a minute after creation.
B
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High-quality energy in natural processes has a tendency to transform into
A) higher quality energy. B) lower quality energy. C) internal energy. D) entropy. E) none of the above
Rank the five terrestrial worlds in order of size from smallest to largest
A) Mercury, Venus, Earth, Moon, Mars B) Mercury, Moon, Venus, Earth, Mars C) Moon, Mercury, Venus, Earth, Mars D) Moon, Mercury, Mars, Venus, Earth E) Mercury, Moon, Mars, Earth, Venus
Briefly describe the two key pieces of evidence that support the Big Bang theory
What will be an ideal response?
In a laboratory experiment, a student brings up the rotational speed of a flywheel to 30.0 rpm. She then allows it to slow down on its own, and counts 240 revolutions before the apparatus uniformly comes to a stop
The moment of inertia of the flywheel is 0.0850 kg ? m2. What is the magnitude of the retarding torque on the flywheel? A) 0.0000136 N ? m B) 0.0787 N ? m C) 0.159 N ? m D) 0.000278 N ? m E) 0.0425 N ? m