Density: Relative Density, Energy Density, Schiehallion Experiment, Current Density, Memory Storage Density, Bone Density, Spec Source Wikipedia

ISBN: 9781156439937

Published: August 13th 2011

Paperback

28 pages


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Density: Relative Density, Energy Density, Schiehallion Experiment, Current Density, Memory Storage Density, Bone Density, Spec  by  Source Wikipedia

Density: Relative Density, Energy Density, Schiehallion Experiment, Current Density, Memory Storage Density, Bone Density, Spec by Source Wikipedia
August 13th 2011 | Paperback | PDF, EPUB, FB2, DjVu, AUDIO, mp3, ZIP | 28 pages | ISBN: 9781156439937 | 9.48 Mb

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 26. Chapters: Relative density, Energy density, Schiehallion experiment, Current density, Memory storage density, Bone density, Specific weight, Density of air, Number density, Charge density, Neutral buoyancy, Potential density, Particle density, Bulk density, Vapour density, Area density, Nuclear density, Torque density, Linear density, Maximum density, Drainage density, Charge carrier density, Knot density, Force density, Orthobaric density, Partial specific volume.

Excerpt: Energy density is a term used for the amount of energy stored in a given system or region of space per unit volume. Often only the useful or extractable energy is quantified, which is to say that chemically inaccessible energy such as rest mass energy is ignored.

Quantified energy is energy that has some sort of, as the name suggests, quantified magnitude with related units. For fuels, the energy per unit volume is sometimes a useful parameter. Comparing, for example, the effectiveness of hydrogen fuel to gasoline, hydrogen has a higher specific energy than gasoline does, but, even in liquid form, a much lower energy density. Energy per unit volume has the same physical units as pressure, and in many circumstances is an exact synonym: for example, the energy density of the magnetic field may be expressed as (and behaves as) a physical pressure, and the energy required to compress a compressed gas a little more may be determined by multiplying the difference between the gas pressure and the pressure outside by the change in volume.

In short, pressure is a measure of volumetric enthalpy of a system. A pressure gradient has a potential to perform work on the surroundings by converting enthalpy until equilibrium is reached. Selected Energy Densities PlotIn energy storage applications the energy density relates the mass of an energy store to the volume of the s...



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