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प्रश्न
The life and work and inventions of Marie Curie are given in detail in the text. Go to your library or search on internet at least five famous scientists who have given great inventions to the world and write about them or prepare a chart showing the information about them.
कृति
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उत्तर
| Scientist | Invention | |
| 1. | Nicholas Tesla | Modern alternating current (AC) |
| 2. | John Napier | Logarithms |
| 3. | John J. Loud | Ballpoint pen |
| 4. | James Lind | Vitamin C |
| 5. | George Eastman | Camera |
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