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Which single muscle contributes most to normal, resting inspiration?
Critical Mass
The minimum amount of fissile material needed to maintain a nuclear chain reaction for a nuclear explosion or a reactor.
Chain Reaction
A series of reactions where a reactive product or by-product causes additional reactions to take place, often leading to a self-sustaining sequence.
Transmutation Reaction
A nuclear reaction in which the nucleus of an atom changes into a nucleus with a different number of protons, thereby changing one element into another.
Alpha Emitter
A type of radioactive decay in which an unstable atom emits an alpha particle consisting of two protons and two neutrons, thereby reducing its atomic number by 2 and mass number by 4.
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