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Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?
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Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks
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Geography, 23.06.2019 14:30
Why slip off slopes are found on the inside of meanders? why river cliffs are found on the outside of meanders?
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Which is the first step in the sea floor spreading process...
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