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Physics, 22.06.2019 00:00
Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?
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Physics, 23.06.2019 04:31
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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Why we get the greatest press are at the greund level...
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