GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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21:33 Dec 4, 2008 |
English to Spanish translations [PRO] Science - Science (general) | |||||||
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| Selected response from: José Nolasco El Salvador Local time: 00:06 | ||||||
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Summary of answers provided | ||||
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5 +3 | Protones con una energía de |
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4 | ... protones con energía superior a 0,9 MeV ... |
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4 -1 | protones con una energía de 900.000 electrón-voltios |
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Protones con una energía de Explanation: Esto podría ayudarte: The minimum energy which must be supplied to extract an electron from a solid; symbol , units J(joule), or more often eV (elecronvolt). It is a measure of how tightly electrons are bound to a material. http://invsee.asu.edu/nmodules/engmod/propwf.html Protons are observed to be stable and their theoretical minimum half-life is 1×1036 years. Grand unified theories generally predict that proton decay should take place, although experiments so far have only resulted in a lower limit of 1035 years for the proton's lifetime. In other words, proton decay has never been witnessed and the experimental lower bound on the mean proton lifetime (2.1×1029 years) is put by the Sudbury Neutrino Observatory[3]. However, protons are known to transform into neutrons through the process of electron capture. This process does not occur spontaneously but only when energy is supplied. The equation is: P+ + e- n + νe where p is a proton, e is an electron, n is a neutron, and νe is an electron neutrino The process is reversible: neutrons can convert back to protons through beta decay, a common form of radioactive decay. In fact, a free neutron decays this way with a mean lifetime of about 15 minutes. http://en.wikipedia.org/wiki/Proton |
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