An element has a half life of 35 billion years you find a
Question: An element has a half life of 3.5 billion years. You find a rock containing a mixture of the element and lead. You determine that 20% of the original element remains; the other 80% decayed into lead. How old is the rock?
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question an element has a half life of 35 billion years you find a rock containing a mixture of the element and lead
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the pulse-generating circuit studied in the discussion board of module 7 generates eight repetitive pulses as shown in
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A 2016 survey of undergraduate students considered this further and found that compared with students that did not use cannabis at least once
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