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If the half-life of a radioactive substance is 600 years, what fraction of the original material is left after 1,800 years?
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What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .
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If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?
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If the half-life of a radioactive substance is 600 years, what fraction of the original material is...
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