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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 22:10
Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine
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Ray lo bisects nlm, lm=18, no=4, and ln=10. what is the value of x?
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Geography, 23.06.2019 08:10
Lomexico, central america, and the caribbean: mastery testselect the correct answer.which of the following was the leading cause of death among native americans after the arrival of europeans? a.conquistadorsb.diseasec.starvationd. warreset
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Which two factors determine the density of seawater? a. salinity and temperature b. centrifugal fo...
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