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Physics, 17.10.2021 21:00 tyannamonae

2. A sample of strontium-90 has an activity of 5000 Bq. After 120 years the activity has fallen to 625 Bq. What is the half life of strontium-90?

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2. A sample of strontium-90 has an activity of 5000 Bq. After 120 years the activity has fallen to 6...

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