What is the quark composition of the ?++? It has no strangeness, no charm, and no top-ness or bottom-ness. Its spin is 3/2
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The full moon by definition occurs
a. for only a day. b. for 7-3/8 days. c. only for an instant. d. only once every month.
Why does the atmosphere of Saturn appear to have only half the helium content of Jupiter?
A) Because Saturn is so much colder, helium does not show up as strongly in its spectrum. B) Saturn was formed farther from the helium rich Sun. C) A red dwarf, Jupiter has fused some of its hydrogen into helium, whereas Saturn, a colder planet, has not. D) Much of Saturn's helium has differentiated towards its center. E) Much of Saturn's helium has reacted with water and formed helium oxide.
Why does the average chemical composition of stars now forming differ from that of older stars?
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Compare the days, seasons, and years of Mars and Earth
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