Interdisciplinary researchers prefer to use the general term, energy rate density, not only to stress the intuitive notion of energy flow (in contrast to more colloquial connotations of the word "power"), but also to unify its potential application among all the natural sciences, as in the cosmology of cosmic evolution. It means that we can eat more of them due to fewer calories. It … Energy density is defined as the amount of energy accumulated in a system per unit volume. In the International System of Units, or SI units, energy density is written as J/m3 J / m 3. In the case of magnetic energy. U E = εE 2 /2. , This term has in recent years gained many diverse applications in various disciplines, including history, cosmology, economics, philosophy, and behavioral biology. … The equation is written. Regardless of the units used, energy rate density describes the flow of energy through any system of given mass, and has been proposed as a measure of system complexity. Electric and magnetic fields store energy. For example, the number of calories available per gram weight of the food. For example, the number of calories per gram of food. Electrical energy density = permittivity* Electric field squared/2. Energy Density is defined as the total amount of energy in a system per unit volume. In a vacuum, the (volumetric) energy density is given by In the case of electrical energy.  When the energy rate density for systems including our galaxy, sun, earth, plants, animals, society are plotted according to when, in historical time, they first emerged, a clear increase in energy rate density over time is observed. The more complex the system, the more energy flows per second through each gram. U B = B 2 /2*μ. The more complex the system, the more energy flows per second through each gram. Energy rate density is the amount of free energy per unit time per unit mass (in CGS metric units erg/s/g; in MKS units joule/s/kg). Energy Density can be defined as the total amount of energy in a system per unit volume. The equation is written. It is terminologically (but not always numerically) equivalent to power density when measured in SI units of W/kg. It is terminologically (but not always numerically) equivalent to power density when measured in SI units of W/kg. Magnetic energy density = magnetic field squared/ 2* magnetic permeability. Foodstuffs that has low energy density provide less energy per gram of food which means that you can eat more of them since there are fewer calories. , Energy rate density is actually a general term that is equivalent to more specialized terms used by many different disciplinary scientists. The general energy is: U = U E + U B. Regardless of the units used, energy rate density describes the flow of energy through any system of given mass, and has been proposed as a measure of system complexity. Foodstuffs have low energy density and will provide less energy per gram of the food. For example, in astronomy it is called the luminosity-to-mass ratio (the inverse of the mass-luminosity ratio), in physics the power density, in geology the specific radiant flux (where “specific” denotes per unit mass), in biology the specific metabolic rate, and in engineering the power-to-weight ratio. The SI unit for energy is a joule, and the SI... See full answer below. , "Energy Rate Density as a Complexity Metric and Evolutionary Driver", "The Natural Science Underlying Big History,", "Using Complexity Science to Search for Unity in the Natural Sciences,", https://en.wikipedia.org/w/index.php?title=Energy_rate_density&oldid=883915096, Articles needing expert attention with no reason or talk parameter, Articles needing unspecified expert attention, Articles needing expert attention from September 2014, Creative Commons Attribution-ShareAlike License, This page was last edited on 18 February 2019, at 12:00. Energy rate density is the amount of free energy per unit time per unit mass (in CGS metric units erg/s/g; in MKS units joule/s/kg).