The star polaris is 133 pc from earth and has an apparent magnitude of +2.0. what is the absolute visual magnitude? a. -3.6 b. +3.6 c. 0 d. none of the above a sample of a meteorite has been analyzed, and the result shows that out of every 1000 nuclei of potassium-40 originally in the meteorite, only 250 have not decayed. how old is the meteorite, if the half-life of potassium-40 is 1.25 million years? a)1.25 million years b) 2.50 million years c) 3.75 million years d) 5.00 million years
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Eastern europe and parts of northern europe have which of the following climates?
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Which process collects sample soils from particular areas of a site? a.) repetitive sampling b.) restorative sampling c.) random sampling d.) representative sampling
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Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor
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The star polaris is 133 pc from earth and has an apparent magnitude of +2.0. what is the absolute vi...
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