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Radioactive decay is a first- order proc...

Radioactive decay is a first`-` order process. Radioactive carbon in wood sample decays with a half`-` life of 5770 years. What is the rate constant `(` in years `)` for the decay ? What fraction would remains after 11540 years ?

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Radioactive decay is a first order process. Radioactive carboon in wood sample dcays with a half life period 5770 year. What is the rate of constant (in years) for the decay? What fraction would remain after 11540 years.
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