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Geography, 22.06.2019 14:40
Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite
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Geography, 22.06.2019 22:40
Which of the following terms describes the layers of air surrounding the earth ?
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Geography, 24.06.2019 08:10
Abird flies at a speed of 75 metres per second for 15 seconds, how far does the bird fly
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Ihave a land in ghana and on the land there is a water and the colour of the water is rusty oil type...
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