In physics, energy (from Ancient Greek: ἐνέργεια, enérgeia, “activity”) is the quantitative property that is to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J). Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object (for instance due to its position in a field), the elastic energy stored in a solid object, chemical energy associated with chemical reactions, the radiant energy carried by electromagnetic radiation, and the internal energy contained within a thermodynamic system. All living organisms constantly take in and release energy. Due to mass–energy equivalence, any object that has mass when stationary (called rest mass) also has an equivalent amount of energy whose form is called rest energy, and any additional energy (of any form) acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy. Human civilization requires energy to function, which it gets from energy resources such as fossil fuels, nuclear fuel, or renewable energy. The Earth's climate and ecosystems processes are driven by the energy the planet receives from the Sun (although a small amount is also contributed by geothermal energy). (Wikipedia).
Learn the basics of what energy is, how it is converted into other forms, and why some sources of energy are more useful and efficient than others. Play the Energy Lab: http://www.pbs.org/wgbh/nova/labs/lab/energy/ Find discussion questions for this video and other resources in the Ener
From playlist NOVA Labs
http://www.teachastronomy.com/ Scientists define energy as the ability to do work. You can also think of energy as something that can cause a change. This sounds vague. But scientists have defined energy in many careful ways, and it is a clearly quantifiable concept in physics. Next ti
From playlist 04. Chemistry and Physics
Teach Astronomy - Types of Energy
http://www.teachastronomy.com/ There are several broad types of energy. Energy is measured in units of calories in the English system or joules in the international system of metric units. One broad category of energy is kinetic energy, or the energy of motion. A second broad category of
From playlist 04. Chemistry and Physics
Kinetic Energy: Example Problems
This video gives an explanation of kinetic and contains several examples for calculating kinetic energy, mass and velocity using the kinetic energy equation. Kinetic energy is the energy an object possesses due to its motion. If an object is in motion then it has kinetic energy. It is als
From playlist Kinetic Energy, Potential Energy, Work, Power
Is renewable energy really sustainable?
Renewable energy is described as replenishable, safe for the environment, and available in the long term. But do all renewable energy sources meet these criteria? Watch to find out. Find out more information at https://bit.ly/3p0Thsz To get the latest science and technology news, su
From playlist Theory to Reality
Energy, Work & Power (24 of 31) Power, An Explanation
Gives an explanation of what power is in physics. Includes a explanation of horsepower and one worked example. Power is the rate a which work is done. Also stated as how fast work is done. Power is calculated as the amount of work done divided by the time it takes to do the specified amo
From playlist Kinetic Energy, Potential Energy, Work, Power
Teach Astronomy - Electromagnetic Energy
http://www.teachastronomy.com/ Light is a form of electromagnetic energy, but it is just one example of a wide array of forms of electromagnetic energy. Light is an electromagnetic wave caused by the microscopic changing electric and magnetic fields. Light and all electromagnetic waves t
From playlist 04. Chemistry and Physics
The Meaning of Energy? Core Physics Principle Explained by Parth G
Energy is an extremely important concept in all of physics. It is used everywhere to describe how different systems will behave. But what exactly is energy in the first place? What is the meaning of energy? This difficult-to-answer question can be thought of in terms of a few different ex
From playlist Thermodynamics by Parth G
Calculating Power in Physics: Example Problems
Many tasks require you to do a certain amount of work. But the same amount of work can be done in a short period of time or over a longer period of time. Power describes how fast work is done. Power is the rate at which work is done. This video explains everything you need to know about wh
From playlist Kinetic Energy, Potential Energy, Work, Power
What is non-mechanical energy and how is it different than mechanical energy? And how can you use an understanding of energy forms to analyze a physical situation? Mr. H examines these questions and equips the skills to be a master of energy in your first year Physics course. The Mechani
From playlist Work and Energy
Energy Transfers and Efficency
IGCSE Edexcel Physics lesson on energy transfers and efficiency
From playlist Edexecel IGCSE Physics
LOL diagrams | Work and energy | Physics | Khan Academy
In this video, David shows how LOL diagrams allow us to visually represent what we mean by conservation of energy as well as what we mean by an energy system. Watch the next lesson: https://www.khanacademy.org/science/physics/work-and-energy/hookes-law/v/vertical-springs-and-energy-conser
From playlist Work and energy | Physics | Khan Academy
Physics 20B. Cosmology. Lec. 12: Energy and the Sun
UCI Physics 20B: Cosmology (Winter 2015) Lec 12. Cosmology -- Energy and the Sun View the complete course: http://ocw.uci.edu/courses/physics_20b_cosmology.html Instructor: James Bullock, Ph.D. License: Creative Commons CC-BY-SA Terms of Use: http://ocw.uci.edu/info More courses at http:
From playlist Physics 20B: Cosmology
Whats the most Energetic thing in the Universe?
Took a while to make and i'm sorry it is so long nevertheless here is : Scale of Energy! If you have any projects you want to suggest next, feel free to leave them in the comment section below!!! Enjoy, Like, Comment and Subscribe! - JG Music: → Kevin MacLeod - Chase Pulse Faster → Han
From playlist Scales of
Mechanical Energy Conservation
This video explains what is meant by mechanical energy conservation and identifies the conditions under which mechanical energy is conserved. Mechanical energy conservation is contrasted with situations in which energy is transferred across the boundary as a result of external forces doin
From playlist Work and Energy
Physics of Energy University of Wisconsin - Madison Executive Producer and Host: Clint Sprott
From playlist The Wonders of Physics with Prof. Sprott - CosmoLearning.com
Mod-01 Lec-40 X-Ray Photoelectron Spectroscopy(XPS)
Nanostructures and Nanomaterials: Characterization and Properties by Characterization and Properties by Dr. Kantesh Balani & Dr. Anandh Subramaniam,Department of Nanotechnology,IIT Kanpur.For more details on NPTEL visit http://nptel.ac.in.
From playlist IIT Kanpur: Nanostructures and Nanomaterials | CosmoLearning.org
Ionization Energy - Basic Introduction
This chemistry video tutorial provides a basic introduction into Ionization Energy. It discusses the periodic trends and exceptions as well as providing plenty of examples and practice problems. The first ionization energy is the energy required to remove an electron from a gaseous atom
From playlist New AP & General Chemistry Video Playlist
Let's Learn Physics: A Lot of Work (and Energy)
The concept of energy is one of the most important ideas in physics. It appears everywhere in physical settings and can be used to vastly simplify problems. In this stream, we will derive the conservation of energy, give physical interpretations to potential and kinetic energy as well as i
From playlist Let's Learn (Classical) Physics: ZAP Physics Livestreams