The mass of the sun is 2*10^30 kg. it currently consists to about 70% (mass) of hydrogen. the dominant source of energy for the sun is the pp-chain (type i) fusion process in which four protons fuse into a 4he core consisting of two protons and two neutrons. this process releases 26.22 mev ( = 4.2*10^-12 j) of energy. assume that to first order the luminosity of the sun remains constant at 1.1 times its current-day value. how long will it take for the sun until the fraction of hydrogen is reduced from 70% to 30%?

answer:

explanation:

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answer; (wisconsin);

explanation: the badger state. this nickname originally referred to the lead miners, of the 1830s, who worked at the galena lead mines in illinois. these mines were in northwestern illinois close to the borders of wisconsin and iowa. the wisconsin miners lived, not in houses, but in temporary caves cut into the hillsides.

i only have few minutes according to the map above, which shows religious cultural regions, what two religions are most commonly practiced in africa? a. christianity and buddhism b. buddhism and hinduism c. islam and christianity d. hinduism and islam