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Q. A sample of a radioactive substance undergoes 80% decomposition in 345 minutes it's half life is ____ minutes 1. ln 2/ ln 5 345 2. ln 5/ ln 2 345 3. ln 5/ ln 4 345 4. ln 4/ ln 5 345 |
| Answer» Q. A sample of a radioactive substance undergoes 80% decomposition in 345 minutes it's half life is ____ minutes 1. ln 2/ ln 5 345 2. ln 5/ ln 2 345 3. ln 5/ ln 4 345 4. ln 4/ ln 5 345 | |