- published: 18 Aug 2015
- views: 94026455
In physics, energy (Greek: ἐνέργεια energeia "activity, operation") is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems. Since work is defined as a force acting through a distance (a length of space), energy is always equivalent to the ability to exert pulls or pushes against the basic forces of nature, along a path of a certain length.
The total energy contained in an object is identified with its mass, and energy (like mass), cannot be created or destroyed. When matter (ordinary material particles) is changed into energy (such as energy of motion, or into radiation), the mass of the system does not change through the transformation process. However, there may be mechanistic limits as to how much of the matter in an object may be changed into other types of energy and thus into work, on other systems. Energy, like mass, is a scalar physical quantity. In the International System of Units (SI), energy is measured in joules, but in many fields other units, such as kilowatt-hours and kilocalories, are customary. All of these units translate to units of work, which is always defined in terms of forces and the distances that the forces act through.
Drake - Energy
Is energy always conserved?
Monster Energy Girls Try Military Food
Keri Hilson - Energy
Camila Cabello Canta Cover de “Work” de Rihanna y “Energy” de Drake
Camila Cabello - Work / Energy (Rihanna/Drake Mashup Cover)
MEEK MILL - ENERGY [DIR x @willknows]
Camila Cabello SLAYS Cover/Mash-Up of Rihanna's "Work" & Drake's "Energy"
Round 11 of Monster Energy Supercross in Detroit 2016
Energy (Audio) - Hillsong Young & Free
All 9 Solfeggio Frequencies | Positive Healing Energy ➤ Activate Your Divine Consciousness ⚛
Thoughts are Energy, Use them wisely! (Law Of Attraction)
WARNING: What Happens If You Drink Boiled Energy Drinks
Hilary Clinton Has A LOW ENERGY Coughing Incident In New York