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The 20 or so minerals that make up most of the rocks of earth's crust are known as?
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The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?
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What was the approximate temperature of the universe at an age of 1015 s?
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The 20 or so minerals that make up most of the rocks of earth's crust are known as?...
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