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ENTRANCE TEST – 2010 :: Discussion
| 18. | The life time of an electron in an excited state is about 10-8 s. What is its uncertainty in energy during this time? | |
| A. | 1.05 x 10-41 J | |
| B. | 1.05 x 10-26 J | |
| C. | 1.15 x 1010 J | |
| D. | 2.19 x 10-40 J | |
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