physics, energy density is the amount of energy stored in a given system or region of space per unit volume. It is sometimes confused with energy per unit...

Sound energy density or sound density is the sound energy per unit volume. The SI unit of sound energy density is the pascal (Pa), which is 1 kg⋅m−1⋅s−2...

power spectral density (PSD) then refers to the spectral energy distribution that would be found per unit time, since the total energy of such a signal...

Specific energy or massic energy is energy per unit mass. It is also sometimes called gravimetric energy density, which is not to be confused with energy density...

This is an extended version of the energy density table from the main Energy density page: Prelas, Mark (2015). Nuclear-Pumped Lasers. Springer. p. 135...

radiation at energy densities in excess of about 100 GJ/m^3. High energy density (HED) science includes the study of condensed matter at densities common to...

energy–momentum tensor, is a tensor physical quantity that describes the density and flux of energy and momentum in spacetime, generalizing the stress tensor of Newtonian...

radiant energy density is the radiant energy per unit volume. The SI unit of radiant energy density is the joule per cubic metre (J/m3). Radiant energy density...

Power density, defined as the amount of power (the time rate of energy transfer) per unit volume, is a critical parameter used across a spectrum of scientific...

"dark energy", an unknown form of energy that is hypothesized to permeate space. On a mass–energy equivalence basis, the density of dark energy (~ 7 ×...

Specific energy density may refer to: Energy density, energy per unit volume Specific energy, energy per unit mass This disambiguation page lists articles...

materials (such that B = μH where μ is frequency-independent), the energy density is: u = B ⋅ H 2 = B ⋅ B 2 μ = μ H ⋅ H 2 . {\displaystyle u={\frac {\mathbf...

nearly negligible. Dark energy's density is very low: 7×10−30 g/cm3 (6×10−10 J/m3 in mass-energy), much less than the density of ordinary matter or dark...

The distortion free energy density is a quantity that describes the increase in the free energy density of a liquid crystal caused by distortions from...

A strain energy density function or stored energy density function is a scalar-valued function that relates the strain energy density of a material to...

HK theorem defines an energy functional for the system and proves that the ground-state electron density minimizes this energy functional. In work that...

Density (volumetric mass density or specific mass) is a substance's mass per unit of volume. The symbol most often used for density is ρ (the lower case...

Dual-energy X-ray absorptiometry (DXA, or DEXA) is a means of measuring bone mineral density (BMD) using spectral imaging. Two X-ray beams, with different...

of light in vacuum). ρ and p are the volumetric mass density (and not the volumetric energy density) and the pressure, respectively. k is constant throughout...

batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life. Also...

spectral energy density. Signal processing Parseval's theorem Spectral density Inner product Mathuranathan (2013-12-20). "Power and Energy of a Signal :...

T^{4}.} The Stefan–Boltzmann law expressed as a formula for radiation energy density is: w e ∘ = 4 c M ∘ = 4 c σ T 4 , {\displaystyle w_{\mathrm {e} }^{\circ...

Maximum charge voltage = 3.60-3.65 V Volumetric energy density = 220 Wh/L (790 kJ/L) Gravimetric energy density > 90 Wh/kg (> 320 J/g). Up to 160 Wh/kg (580 J/g)...

particularly general relativity, an energy condition is a generalization of the statement "the energy density of a region of space cannot be negative"...

{\displaystyle \rho } is the energy density. The parameter w {\displaystyle w} is the equation of state parameter. The energy density of such a fluid drops as...

total energy density. Curvature is negative if its density is less than the critical density; positive if greater; and zero at the critical density, in...

Vacuum energy is an underlying background energy that exists in space throughout the entire Universe. The vacuum energy is a special case of zero-point...

Local-density approximations (LDA) are a class of approximations to the exchange–correlation (XC) energy functional in density functional theory (DFT)...

High-energy-density matter (HEDM) is a class of energetic materials, particularly fuel, with a high ratio of potential chemical energy output to density,...

expanding space behind it, under the assumption that a configurable energy-density field lower than that of vacuum (that is, negative mass) could be created...