The matter in white dwarfs is about a million times denser than matter around you, since you have packed the mass of the Sun into the volume of our Earth
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If the earth were twice as far from the sun as it presently is, how long (in terms of the present year) would it take it to make one orbit around the sun?
A) 2.0 years B) 2.8 years C) 4.0 years D) 5.7 years E) 16 years
Two spaceships traveling in opposite directions along parallel lines measure their own and the other spaceship's length while passing one another. The crew on spaceship A says that their ship is 1000 m long and that ship B is 800 m long. The crew on ship B says that their ship is 1000 m long and that ship A is 800 m long. At what speed does each crew say that the other ship is traveling relative to their own ship?
A. 0.36c B. 0.60c C. 0.64c D. 0.80c E. 1.25c
Elements in Period 2 of the periodic table have electrons in how many shells?
a. 1 b. 3 c. 4 d. 2
The quark structure of the neutron is udd
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