Energy is never created or destroyed, only transformed
In short: Understanding the fundamental laws of physics requires distinguishing between how energy moves and how it is contained. This video breaks down the conservation of energy and the critical difference between open and closed systems.
The Principle of Conservation of Energy dictates that while energy can be transferred, stored, or dissipated, it is impossible to create or destroy it. For instance, charging a mobile phone converts electrical energy into chemical energy, which is later transformed into light and sound.
The video clarifies the distinction between useful and wasted energy, noting that wasted energy is frequently dissipated as heat. It also defines systems based on their interaction with the environment: open systems exchange both matter and energy, while closed systems keep both contained, ensuring the total energy remains constant.
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Sources
- Summary by Intellect · source: GCSE Physics - Conservation of Energy | Open & Closed Systems (2027/28 exams)
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