Mathematics, 21.07.2019 18:30 jwbri
What is the sun made of (by mass)? a. 50 percent hydrogen, 25 percent helium, 25 percent other elements b. 70 percent hydrogen, 28 percent helium, 2 percent other elements c. 90 percent dark matter, 10 percent ordinary matter d. 100 percent hydrogen and helium?
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What is the sun made of (by mass)? a. 50 percent hydrogen, 25 percent helium, 25 percent other elem...
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