B How Did Scientists Develop and Validate the Atomic Model?

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The discussion revolves around understanding the foundational concepts of electricity and atomic theory from the book "Teach Yourself Electricity and Electronics." The initial confusion arises from the statement that all matter consists of tiny particles in constant motion, prompting a question about the scientific evidence behind this claim. It is clarified that the focus should be on how scientists developed the atomic model through the scientific method, rather than where they observed these particles. The conversation suggests exploring the history of atomic theory for a deeper understanding. This foundational knowledge is crucial for grasping more complex concepts in electricity.
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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?
 
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Itry said:
OK, while I am willing to accept that, how do scientists know this, I mean where did they see this?
It's not "where" scientists saw this but "how" scientists proceeded to develop and refine the atomic model following the scientific method of forming and validating hypotheses. You might wish to read about the history of the atomic theory here.
https://en.wikipedia.org/wiki/History_of_atomic_theory
 
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Thread 'Why higher speeds need more power if backward force is the same?'

Thread 'Why higher speeds need more power if backward force is the same?'

Power = Force v Speed Power of my horse = 104kgx9.81m/s^2 x 0.732m/s = 1HP =746W Force/tension in rope stay the same if horse run at 0.73m/s or at 15m/s, so why then horse need to be more powerfull to pull at higher speed even if backward force at him(rope tension) stay the same? I understand that if I increase weight, it is hrader for horse to pull at higher speed because now is backward force increased, but don't understand why is harder to pull at higher speed if weight(backward force)...
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