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Unit 6 NOTES Potential Energy Diagram: a diagram for a chemical reaction that shows the total change in energy as reactants change into products. Activation energy (E a): the minimum amount of energy reactants must have in order for the chemical reaction to occur and make products. Enthalpy (H): the total heat content (or energy) of a system. Usually measured in joules (J) or kilojoules and , that the electric potential at point (relative to point ) is solely a property of the electric field, and is, therefore, the same for any charge placed at that point. We shall see exactly how the electric potential is related to the electric field later on. The dimensions of electric potential are work (or energy) per unit charge.
The energy can be converted to in different forms, however, its total energy is not changed. The common energy forms include the radiant energy, kinetic energy and various types of potential energy. It is a scalar. The SI unit of energy is joules, symbol "J". but in some areas are accustomed to use other units, such as kilowatt-time and calories.Given the velocity potential (that can be obtained through linear wave theory) one can derive the kinetic and potential energy of a wave per meter of crest and unit of surface. The sum of these two energies can be found to be  Lesson: Kinetic vs. Potential Energy. Duration: Approximately 45 minutes. Students learn to contrast potential and kinetic energy and discover that even when objects are at rest, they can have energy due to their position or shape. Children swinging at a playground serve as the initial model of how energy transfers between potential and kinetic ... The conventional unit of electrical energy usage employed by utility companies is the kilowatthour. If electrical energy is consumed for 1 hour at the rate of 1 kW (the typical rate of consumption of a single-bar electric fire) then the total energy usage is one kilowatthour (kWh). Gravitational potential energy (GPE) is an important physical concept that describes the energy something possesses due to its position in a gravitational field. The GPE formula GPE = mgh shows that it depends on the mass of the object, the acceleration due to gravity and the height of the object. The unit for energy in the International System of Units (SI) is the joule, which has the symbol J. The term potential energy was introduced by the 19th-century Scottish engineer and physicist William Rankine, although it has links to Greek philosopher Aristotle's concept of potentiality. Potential energy is associated with forces that act on a ...Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure and matrix effects such as capillary action (which is caused by surface tension). The thermal energy content or heating value of crude oil depends on its composition, but generally averages about 6 million BTU per barrel, where a BTU (British Thermal Unit) is the amount of energy required to increase the temperature of one pound of water by 1°F. Thus, a barrel of oil that sells for $48 would provide energy at an equivalent ...
E p = potential energy (J, ft lb) m = mass of body (kg, slugs) a g = acceleration of gravity on earth (9.81 m/s 2, 32.17405 ft/s 2) Δh = change in elevation (m, ft) Example - Potential Energy of Elevated Body - in SI units. A body of 1000 kg is elevated 10 m. The change in potential energy can be calculated as E p = (1000 kg) (9.81 m/s 2) (10 m) = 98100 J Units are magnitudes of a physical quantity, defined by convention or law which sets a standard for any measurements of the same physical quantity. For example, mass is a physical quantity, and a kilogram is a unit that measures mass.
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We say that the potential energy is transformed into kinetic energy, which is then spent driving in the nail. We should emphasize that both energy and work are measured in the same units, joules. In the example above, doing work by lifting just adds energy to a body, so-called potential energy, equal to the amount of work done. Processing... ... ... The SI unit for energy is called the joule (J). 1 joule is defined as the amount of energy transferred when a force of 1 Newton moves a 1 kg object a distance of 1 meter. Potential energy is the energy possessed by an object in virtue of its positionDefinition: Joule The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honor of the physicist James Prescott Joule (1818-1889). Electric potential energy, or Electrostatic potential energy, is a potential energy (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.An object may have electric potential energy by virtue of two key elements: its own electric charge and its relative position to other ...Get the latest news and analysis in the stock market today, including national and world stock market news, business news, financial news and more