Physics, 20.09.2020 07:01 kaylag8242p2qj2e
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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A sample of strontium-90 has an activity of 5000 Bq. After 120 years the activity has fallen to 625...
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