Examlex
The excited state of a certain atom is 3.2 eV ± 0.21 eV.
(a) What is the average lifetime of this state?
(b) If the excited energy doubled (6.4 eV ± 0.21 eV) how would the lifetime be affected?
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The range of different items, products, or choices available within a category or market.
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A term from economics referring to the situation where two parties each hold an item the other wants, enabling an exchange without the need for money.
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