Chemistry, 25.06.2019 18:10 flyingcerberus1408

The decay of 40k has a half of 1.3 × 109 years. the age of the earth is estimated at 4.6 × 109 years. the decay of 40k is a major heat source for the earth's interior. relative to today, how much more heat was produced by 40k in the early archaeon era or 3.9 × 109 years ago?

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