A Geiger counter records an activity of 28 counts per minute (cpm) when located at a distance of 10 m. What will be the activity (in cpm) at a distance of 5 m?
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A Geiger counter records an activity of 28 counts per minute (cpm) when located at a distance of 10 m. What will be the activity (in cpm) at a distance of 5 m?
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