Mathematics

Alina Scott

6 March, 16:52

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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