A radioactive source of half-life 2h 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
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A radioactive source of half-life 2h 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 radioactive source of half-life 2h emits radiation of intensity which is 64 times the permissible safe level. The minimum time [...]