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CHAPTER 14. Sources of Energy. In Class IX, we learnt that the total energy during a physical or chemical process is conserved. Why, then, do we hear so much about the energy crisis? If energy can neither be created nor destroyed, we should have no worries! We should be able to perform endless activities without thinking about energy resources!
The law of conservation of energy states that energy can neither be created nor be destroyed. Although, it may be transformed from one form to another. If you take all forms of energy into account, the total energy of an isolated system always remains constant. All the forms of energy follow the law of conservation of energy. In brief, the law ...
- 6 min
- Energy is the ability to do work.
- In a closed system, i.e., a system that is isolated from its surroundings, the total energy of the system is conserved.
- In this phenomenon, potential energy is converted into kinetic energy.
- When the dynamite explodes, potential energy is converted into kinetic energy.
- A moving car proves that potential energy is converted into kinetic energy.
the work loses energy and the object on which the work is done gains energy. How does an object with energy do work? An object that possesses energy can exert a force on another object. When this happens, energy is transferred from the former to the latter. The second object may move as it receives energy and therefore do some work.
- 12.2 MOLECULAR NATURE OF MATTER
- Atomic Hypothesis in Ancient India and Greece
- 12.4 KINETIC THEORY OF AN IDEAL GAS
Richard Feynman, one of the great physicists of 20th century considers the discovery that “Matter is made up of atoms” to be a very significant one. Humanity may suffer annihilation (due to nuclear catastrophe) or extinction (due to environmental disasters) if we do not act wisely. If that happens, and all of scientific knowledge were to be destroy...
Though John Dalton is credited with the introduction of atomic viewpoint in modern science, scholars in ancient India and Greece conjectured long before the existence of atoms and molecules. In the Vaiseshika school of thought in India founded by Kanada (Sixth century B.C.) the atomic picture was developed in considerable detail. Atoms were though...
Kinetic theory of gases is based on the molecular picture of matter. A given amount of gas is a collection of a large number of molecules (typically of the order of Avogadro’s number) that are in incessant random motion. At ordinary pressure and temperature, the average distance between molecules is a factor of 10 or more than the typical size of a...
Dec 14, 2023 · The Law of Conservation of Energy is a fundamental principle in physics stating that the total energy of an isolated system remains constant over time. It asserts that energy cannot be created or destroyed, only transformed from one form to another.
Jan 30, 2024 · Law of Conservation of Energy. Power. Collision. How to Use Physics Class 11 Chapter 6 Notes PDF Effectively. Key features of Units and Measurements class 11 notes. Significance of NCERT Class 11 Physics Chapter 6 Notes. NCERT Class 12 Notes Chapter-Wise.
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Aug 29, 2024 · The law of energy conservation is one of the most important laws of science; it states that we can neither create energy nor destroy it. This means the total energy of the isolated system remains constant unless some energy is added from outside. However, there are devices that convert energy from one form to another.
