Part 4: Mechanics6 of 54 entries
4-12.1
moment of forcebb(ii(M))
vector (iso80000-2) quantity described by the vector product: where is position vector (iso80000-3) with respect to the…
4-12.2
torque, torqueT
quantity described by the scalar product: where is moment of force (t4-12.1) and is unit vector of direction with…
4-28.1
potential energyV
for conservative force , scalar additive quantity obeying condition , if it exists
4-28.2
kinetic energyT
scalar (iso80000-2) quantity characterizing a moving body expressed by: where is mass (t4-1) of the body and is its…
4-28.3
mechanical energyE
sum of kinetic energy (t4-28.2) and potential energy (t4-28.1):
4-28.4
mechanical work, workA
process quantity describing the total action of a force (t4-9.1) along a continuous curve in three-dimensional space…
Part 5: Thermodynamics7 of 54 entries
5-6.1
heat, amount of heatQ
difference between the increase in the internal energy (t5-20.2) of a system and the work (iso80000-4) done on the…
5-6.2
latent heatQ
energy released or absorbed by a system during a constant-temperature process
5-20.1
energy <thermodynamics>E
ability of a system to do work (iso80000-4)
5-20.2
internal energy, thermodynamic energyU
energy of a system whose change is given by the amount of the heat (t5-6.1) transferred to the system and the work…
5-20.3
enthalpyH
sum of internal energy of the system and the product of pressure and volume of the system: where is internal energy…
5-20.4
Helmholtz energy, Helmholtz functionA
difference of internal energy of the system and the product of thermodynamic temperature and entropy of the system:…
5-20.5
Gibbs energy, Gibbs functionG
difference of the enthalpy and the product of thermodynamic temperature and entropy of the system: where is enthalpy…
Part 6: Electromagnetism1 of 85 entries
Part 7: Light and Radiation3 of 66 entries
7-2.1
radiant energy <electromagnetism>Q_"e"
energy (iso80000-5) emitted, transferred or received in form of electromagnetic waves
ent
7-2.2
spectral radiant energyQ_("e",lambda)
spectral density of radiant energy, expressed by where is radiant energy (t7-2.1) in terms of wavelength (iso80000-3)
7-19.2
photon energyQ_"p"
product of the Planck constant and frequency, expressed by where is the Planck constant (iso80000-1) and is the…
ent
Part 8: Acoustics1 of 18 entries
Part 9: Physical Chemistry1 of 62 entries
Part 10: Atomic and Nuclear13 of 125 entries
10-3
rest energyE_0
energy (iso80000-5) of a particle at rest: where is the rest mass (t10-2) of that particle, and is speed of light in…
10-8
Hartree energyE_"H"
energy (iso80000-5) of the electron in a hydrogen atom in its ground state: where is the elementary charge…
ent
10-26
level widthii(Gamma)
quotient of the reduced Planck constant and the mean life: where is the reduced Planck constant (iso80000-1), and is…
ent
10-32
alpha disintegration energyQ_alpha
sum of the kinetic energy (iso80000-4) of the -particle produced in the disintegration process and the recoil energy…
ent
10-33
maximum beta-particle energyE_beta
maximum kinetic energy (iso80000-4) of the emitted beta particle produced in the nuclear disintegration process
10-34
beta disintegration energyQ_beta
sum of the maximum beta-particle kinetic energy (t10-33) and the recoil energy (iso80000-5) of the atom produced in a…
ent
10-37.1
reaction energyQ
in a nuclear reaction, sum of the kinetic energies (iso80000-4) and photon energies (iso80000-5) of the reaction…
ent
10-37.2
resonance energyE_"r"
kinetic energy (iso80000-4) of an incident particle, in the reference frame of the target, corresponding to a resonance…
ent
10-45
radiant energy <ionizing radiation>R
mean energy (iso80000-5), excluding rest energy (t10-3), of the particles that are emitted, transferred, or received
10-55
total mass stopping power, mass stopping powerS_m
quotient of the total linear stopping power (t10-54) and the mass density (iso80000-4) of the material:
10-60
average energy loss per elementary charge producedW_"i"
quotient of the initial kinetic energy (iso80000-4) of an ionizing charged particle and the total ionization (t10-59)…
ent
10-80.1
energy impartedepsilon
sum of all energy deposits in a given volume: where the summation is performed over all energy (iso80000-5) deposits of…
ent
10-80.2
mean energy impartedbar epsilon
expectation value of the energy imparted (t10-80.1): where is the radiant energy (t10-45) of all those charged and…
↑ 1
Part 12: Condensed Matter7 of 60 entries
12-24.1
work functionphi
difference between energy (iso80000-5) of an electron at rest at infinity and the Fermi energy (t12-27.1)
ent
12-24.2
ionization energyE_"i"
difference between energy (iso80000-5) of an electron at rest at infinity and a certain energy level which is the…
ent
12-25
electron affinity <condensed matter physics>chi
energy (iso80000-5) difference between an electron at rest at infinity and an electron at the lowest level of the…
ent
12-27.1
Fermi energyE_"F"
in a metal, highest occupied energy level at zero thermodynamic temperature (iso80000-5), where energy level means the…
ent
12-27.2
gap energyE_"g"
difference in energy (iso80000-5) between the lowest level of conduction band and the highest level of valence band at…
12-34
exchange integralK
constituent of the interaction energy (iso80000-5) between the spins of adjacent electrons in matter arising from the…
ent
12-37
superconductor energy gapii(Delta)
width of the forbidden energy band (t12-24.2) in a superconductor
Part 13: Information Science4 of 84 entries
13-18
carrier powerii(P)_"c"
power supplied to the antenna feed line by a radio transmitter taken under the condition of no modulation
↑ 1
13-19
signal energy per binary digitii(E)_"b"
where is carrier power (t13-18) and is period of binary digits (t13-14)
13-18
carrier powerP_C
power supplied to the antenna feed line by a radio transmitter taken under the condition of no modulation
↑ 1
13-19
signal energy per binary digitE_{"bit"}
where is carrier power (t13-18) and is period of binary digits (item 13-14)