Itry
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I'm reading a book about electricity (Teach Yourself Electricity and Electronics) because I want to know more about electricity. So I started reading this book, seems well written, but right at the beginning I couldn't figure out what is meant. And so I had to stop. It's talking about atoms and says "All matter consists of countless tiny particles in constant motion." OK, while I am willing to accept that, how do scientists know this, I mean where did they see this?