Black holes with masses greater than a million solar masses explain the extremely rapidly moving stars and gas in the cores of galaxies
Indicate whether the statement is true or false
TRUE
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The oxygen atoms in Earth's atmosphere were created
A. during the formation of the Earth. B. by nuclear fusion in massive stars. C. when atoms first formed, about half a million years after the beginning of the universe. D. during the Big Bang.
Most of the mass of our galaxy lies between Earth and the Galactic center
Indicate whether the statement is true or false
The uncertainty in the position of a proton is 250 pm. What is the minimum velocity of the proton when its position has been measured to this precision?
A. 0.29c B. 0.10c C. 0.39c D. 0.21c
Compared to the buoyant force on you when floating in fresh water, buoyant force on you when floating in the dense water of the Dead Sea is
A) less because volume displacement is less. B) more because of the greater density of fluid displaced. C) the same.