Sentences with phrase «about radioactive decay»
Not exact matches
«The advantage of isochron dating as compared to simple radiometric dating techniques is that no assumptions are needed about the initial amount of the daughter nuclide in the radioactive decay sequence.»
http://religion.blogs.cnn.com/
«About 20 percent of the helium is coming from the moon itself, most likely as the result from the decay of radioactive thorium and uranium, also found in lunar rocks,» said Benna.
If the original asteroids were bigger than about 20 kilometers across — and there's no reason to think they weren't — decaying radioactive elements inside them would have made the rock hotter than that.
The findings, in the July 28 Nature, suggest that the origin of the 30 trillion to 45 trillion watts of heat produced by the earth's interior is about evenly divided between radioactive decay and leftover heat from the planet's molten formation.
What makes the pp reaction hard is that the neutrinos have very low energy that is about the same as the energy of various radioactive decays that happen on Earth, making it easy for an earthbound detector to confuse a decay with a neutrino event.
The researchers have about 48 hours to take their measurements — after that, the radioactive material has largely decayed and the radiation is too weak.
Curiosity's RTG was designed to supply about 125 watts — less energy than what is needed to power a microwave oven — though power levels fall as the radioactive plutonium decays.
«If emissions are rapidly reduced, then the decrease in the fraction of radiocarbon in the atmosphere will be equivalent to only about a hundred years of radioactive decay,» said Graven.
Tangentially related to what James asked about geothermal power generation, you forgot to mention that radioactive decay is the source of most geothermal energy, something like 30 terawatts of flux these days according to my Google expertise.
The thermal flux from the relic fossil heat from the Earth's interior plus radioactive decay, is about 50TW total, is only 0.03 % of the energy budget according to wikipedia.
If you ignore radioactive decay, then an Earth - mass, Earth - radius planet would have a temperature of around 6K after about 10 billion years.
Even in the Earth today, radioactive decay generates about 20TW of energy.
«About 50 % of the heat given off by the Earth is generated by the radioactive decay of elements such as uranium and thorium, and their decay products.
Seems the radioactive decay of elements is estimated to be ~ 30TW (thought to be ~ 80 % of the earth's internal heating based on Wikipedia) which would result in about 0.1 K of the 33K difference.