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Decreased sensitivity to an unchanging stimulus is known as
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The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)
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Physics, 23.06.2019 12:30, mlandon922
Moria is drawing the electric field lines around a pair of charges. one charge is positive, and the other charge is negative.
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