What is the Local Bubble?
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The Local Bubble is a large region, approximately 100 parsecs across, of lower density interstellar gas. This region was likely carved out by a supernova some 300,000 years ago. The gas is much thinner than the surrounding interstellar medium, possibly only 5000 atoms per cubic centimeter.
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What do astronomers think is the eventual fate of a white dwarf?
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In the electron double-slit experiment, the Schroedinger equation enables scientists to predict
A) the overall pattern made by a large number of electron impacts on the screen. B) which slit the electron will come through. C) the pattern that one single electron will produce when it hits the screen. D) the precise position and velocity of each electron. E) the place at which each electron will hit on the screen.
The Sun appears to rotate only because Earth is revolving about the Sun
a. True b. False Indicate whether the statement is true or false
Propene and cyclopropane are
a. the same compound. b. isomers. c. neither isomers nor the same compound.