Physics · Nuclei
There are 1010 radioactive nuclei in a given radioactive element sample. Its half-life is 1 minute. How many nuclei will remain after 30 seconds? (Given √2 = 1.414)
- 14 × 1010
- 22 × 1010
- 3105
- 47 × 109✓
Correct answer
7 × 109
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