Physics

Physics

Problem

A radioactive source has an initial activity of

1600\,\text{Bq}

. After some time its activity is found to be

100\,\text{Bq}

. If its half-life is

15\,\text{days}

, the time that has elapsed is a)

50\,\text{days}

b)

60\,\text{days}

c)

75\,\text{days}

d)

45\,\text{days}

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