GCSE Physics - Conservation of Energy | Open & Closed Systems (2026/27 exams)

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** WHAT'S COVERED **
1. The Principle of Conservation of Energy.
This fundamental principle states that energy can be transferred, stored, or dissipated, but it can never be created or destroyed.
2. Energy Transfers.
An example of energy transfers when charging and using a mobile phone.
This includes the conversion from electrical energy to a chemical energy store, and then to light and sound energy.
3. Useful and Wasted Energy.
The concept of useful energy transfers versus wasted (dissipated) energy.
Wasted energy is often transferred as heat to the surroundings.
4. Open and Closed Systems.
Definition of a system and its environment in physics.
The difference between an open system, where energy and matter can be exchanged with the environment, and a closed system, where they cannot.
In a closed system, the total energy remains constant.

** CHAPTERS **
0:00 Introduction
0:46 Energy Transfer Example: Charging a Phone
1:31 Useful vs Wasted Energy
1:59 Open and Closed Systems

** PLAYLISTS **
   • KS3 Biology  
   • KS3 Chemistry  
   • GCSE Maths (9-1)  
   • GCSE Biology (9-1)  
   • GCSE Chemistry (9-1)  
   • GCSE Physics (9-1)  
   • A-Level Biology  


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