Conservation of energy | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! www.khanacademy.org/science/highschool-physics/x66… Energy is a conserved quantity. If a system is isolated, the total energy of the system remains constant as energy converts from one form to another. If a system is not isolated, the total energy of the system can change. However, the amount by which the system's energy changes is exactly equal to the amount of energy that transferred to or from the surroundings. Sections: 00:00 - Intro 00:16 - What is a system? 01:35 - Applying conservation of energy 04:26 - Energy conservation with friction 08:00 - Energy conservation in orbits 09:50 - Energy conservation in approaching nuclei 13:50 - Energy conservation in electron transitions ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: www.khanacademy.org/donate?utm_source=youtube&utm_… Volunteer here: www.khanacademy.org/contribute?utm_source=youtube&…

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