Question:
A freshly prepared radioactive source of half life 2 h emits
Last updated: 6/6/2023
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A freshly prepared radioactive source of half life 2 h emits radiation of intensity which is 64 times the permissible safe level The minimum time after which it would be possible to work safely with this source is a 128 h b 24 h c 6 h d 12 h