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Fill in the blanks:
| derived units | Coulomb | density |
| Proxima centauri | Ampere | Alpha centauri |
| Archimedes | System of International Units | mercury |
| one astronomical unit | Centimetre Gram Second | Candela |
| Light year | fundamental units | physical units |
1. The second closest star to our solar system is.
2. \(13600\) \(kg/ m^3\) is the density of.
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