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| 183_notes:define_energy [2018/05/29 21:10] – hallstein | 183_notes:define_energy [2021/03/11 05:10] – [What is Energy?] stumptyl |
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| //"Energy is a numerical quantity, which does not change when something happens...."// | //"Energy is a numerical quantity, which does not change when something happens...."// |
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| The above quotes come from [[http://en.wikipedia.org/wiki/Richard_Feynman|Richard Feynmann]], a 20th century physicist who is thought to have some of the greatest insights into the physical world. He's being a bit flippant about our knowledge of energy, but he's not wrong. We don't know what energy is. We know that energy is a conserved quantity. That is, you can track the energy of a system and see that it changes forms, but it is not created or destroyed. In this set of notes, you will read a brief bit about the history of different energy ideas, about the different forms of energy, and the first law of thermodynamics (conservation of energy). | The above quotes come from [[http://en.wikipedia.org/wiki/Richard_Feynman|Richard Feynmann]], a 20th century physicist who is thought to have some of the greatest insights into the physical world. He's being a bit flippant about our knowledge of energy, but he's not wrong. We don't know what energy is. We know that energy is a conserved quantity. That is, you can track the energy of a system and see that it changes forms, but it is not created or destroyed. **In this set of notes, you will read a brief bit about the history of different energy ideas, about the different forms of energy, and the first law of thermodynamics (conservation of energy).** |
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| ==== Lecture Video ==== | ==== Lecture Video ==== |