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Mathematics is the most important tool of science. The quest to understand the world and the universe using mathematics is as old as civilisation, and has led to the science and technology of today. Learn about the techniques and history of mathematics on


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Question: Which of these is not a source of energy?

Go to the article about: Energy Types

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"Now, I am afraid my usefulness has ended."
"Maestro Galileo, don't be like that. I promise you you will go down in history."
"That's what my teacher told me. If you don't study harder, he said, you will go down in history."

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