Answers: 3
Geography, 22.06.2019 14:40, thezbell
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
Answers: 2
Geography, 23.06.2019 07:30, heartprague
Brazilians, like the u. s., communicate directly and you have to be careful with the use of slang. their communication style is a. low-context b. high-context
Answers: 1
on earth, a vertical mass-spring system has a period of 6.0 s. what is the period of the same system...
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