16. Approximately how many Bq would be needed to produce an exposure rate of 10 mR/hr at 10 cm from a Cobalt-57 source?
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16. Approximately how many Bq would be needed to produce an exposure rate of 10 mR/hr at 10 cm from a Cobalt-57 source?
16. Approximately how many Bq would be needed to produce an exposure rate of 10 mR/hr at 10 cm from a Cobalt-57 source? (Co-57 decays 86% of the time by emitting a 122 keV gamma ray).
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