Where is the center of the Universe?
A.) The center of the Universe is near a particular distant galaxy, and the Big Bang originated only at that point.
B.) The Andromeda Galaxy is at the center of the Universe. Everything expanded from there.
C.) There is no center to the Universe. Expansion is happening everywhere.
D.) The Milky Way Galaxy is at the center of the Universe. Everything expanded from there.
E.) No one knows where the center of the Universe is.
Ans: C.) There is no center to the Universe. Expansion is happening everywhere.
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If we imagine the history of the universe compressed into one year, dinosaurs became extinct
A) about 6 months ago. B) about 3 weeks ago. C) yesterday morning. D) about an hour ago.
When an object is at rest on the Earth, the gravitational force disappears
Indicate whether the statement is true or false
Kepler's Laws: Let the orbital radius of a planet be R and let the orbital period of the planet be T. What quantity is constant for all planets orbiting the sun, assuming circular orbits?
A. T/R B. T/R2 C. T2/R3 D. T3/R2 E. T2/R
You do 174 J of work while pulling your sister back on a swing, whose chain is 5.10 m long. You start with the swing hanging vertically and pull it until the chain makes an angle of 32.0° with the vertical with your sister is at rest
What is your sister's mass, assuming negligible friction? A) 22.9 kg B) 19.5 kg C) 26.3 kg D) 28.4 kg