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seen Mar 31 at 23:50

Mar
10
comment Radioactive decay is the main source of the earth's interior heat: fact or theory?
What makes you say the majority of the Earth's current temperature gradient is explained by nuclear fission? According to the Wikipedia article on the Earth's internal heat budget "the relative contribution of the two main sources of Earth's heat, radiogenic and primordial heat, are highly uncertain because their direct measurement is difficult."
Mar
9
asked Radioactive decay is the main source of the earth's interior heat: fact or theory?
Feb
25
comment Would it be possible to calculate the expected frequency of impact craters of all sizes on Earth
"The rock, around a metre in diameter, travelling at 61,000 km/hr, ploughed into an ancient lava-filled basin called the Mare Nubium five months ago. The impact produced a flash almost as intense as the Pole Star and took more than eight seconds to fade. The impact energy was equivalent to 15 tonnes of TNT.
Feb
18
comment Would it be possible to calculate the expected frequency of impact craters of all sizes on Earth
And speaking of "knobs" and "model" now that I think of it the frequency of impact (cratering flux?) over the last 4 billion years is another factor. Whether 90% or 25% of all impactors ever to have struck Earth occurred a billion years ago, would lead to quite a difference in estimating present day risk.
Feb
15
revised Would it be possible to calculate the expected frequency of impact craters of all sizes on Earth
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Feb
14
awarded  Student
Feb
13
asked Would it be possible to calculate the expected frequency of impact craters of all sizes on Earth