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What is the half-life of the element that registers 360 counts per hour and 18 hours later the rate becomes 45 counts per hour?
Wiki User
∙ 16y ago
After 3 half lifes there will 45 counts per hour (360 -> 180 -> 90 ->45). Therefore 3 half lifes equals 18 hours. One half life is therefore 6 hours.
Wiki User
∙ 16y ago
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