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If the half-life of cesium-137 is 30 years approximately how much time will be required to reduce a 1 kg sample to about 1 g?
Chipmunk81
I'll say 300 years = 10 half-lives. Look at it backwards. Start with 1g, and double it every time you go back 30 years. (1) x (2)10 = 1,024 which is where you want to be. Since it took 10 doublings, that's 10 half-lives.
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∙ 14y ago
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