Physics, 04.07.2020 14:01 Ladarius622

To measure the activity of a rock thought to be radioactive, a physicist puts the rock beside a detector and counts 225 particles in 10 minutes. To check for background, she removes the rock and then records 90 particles in 6 minutes. She converts both these answers into rates, in particles per hour, and takes their difference to give the activity of the rock alone. What is her final answer, in particles per hour, and what is its uncertainty

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To measure the activity of a rock thought to be radioactive, a physicist puts the rock beside a dete...