Joule
The joule (); (symbol: J), is a derived unit of energy in the International System of Units. It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre (1 newton metre or Nâ‹…m). It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818â€“1889).
In terms firstly of base SI units and then in terms of other SI units:
J
=
kg
â‹…
m
2
s
2
=
N
â‹…
m
=
Pa
â‹…
m
3
=
W
â‹…
s
=
C
â‹…
V
,
{\displaystyle {\text{J}}={\frac {{\text{kg}}\cdot {\text{m}}^{2}}{{\text{s}}^{2}}}={\text{N}}\cdot {\text{m}}={\text{Pa}}\cdot {\text{m}}^{3}={\text{W}}\cdot {\text{s}}={\text{C}}\cdot {\text{V}},}
where kg is the kilogram, m is the metre, s is the second, N is the newton, Pa is the pascal, W is the watt, C is the coulomb, and V is the volt.
One joule can also be defined as:
The work required to move an electric charge of one coulomb through an electrical potential difference of one volt, or one "coulomb-volt" (Câ‹…V). This relationship can be used to define the volt.
The work required to produce one watt of power for one second, or one "watt-second" (Wâ‹…s) (compare kilowatt-hour â€“ 3.6 megajoules). This relationship can be used to define the watt.
Foe (adjective)
Hostile.
Foe (noun)
An enemy.
Foe (noun)
A unit of energy equal to 10^{44} joules.
Joule (noun)
In the International System of Units, the derived unit of energy, work and heat; the work required to exert a force of one newton for a distance of one metre. Also equal to the energy of one watt of power for a duration of one second. Symbol: J
"The Greisenâ€“Zatsepinâ€“Kuzmin limit (GZK limit) is a theoretical upper limit on the energy of cosmic rays (high energy charged particles from space) coming from "distant" sources. The limit is 5Ă—10^{19} eV, or about 8 joules. The limit is set by slowing-interactions of cosmic ray protons with the microwave background radiation over long distances (~163 million light-years). The limit is at the same order of magnitude as the upper limit for energy at which cosmic rays have experimentally been detected. For example, one ultra-high-energy cosmic ray has been detected which appeared to possess a record 50 joules (312 million TeV) of energy (about the same as a 60 mph baseball).^{w|Greisenâ€“Zatsepinâ€“Kuzmin limit|WP}"
Foe (noun)
an enemy or opponent
"his work was praised by friends and foes alike"
Foe (noun)
One who entertains personal enmity, hatred, grudge, or malice, against another; an enemy.
Foe (noun)
An enemy in war; a hostile army.
Foe (noun)
One who opposes on principle; an opponent; an adversary; an ill-wisher; as, a foe to religion.
Foe
To treat as an enemy.
Joule (noun)
A unit of work which is equal to 107 ergs (the unit of work in the C. G. S. system of units), and is equivalent to one watt-second, the energy expended in one second by an electric current of one ampere in a resistance of one ohm; also called the absolute joule. It is abbreviated J or j. The international joule is slightly larger, being 1.000167 times the absolute joule. The absolute joule is approximately equal to 0.737562 foot pounds, 0.239006 gram-calories (small calories), and 3.72506 x 10-7 horsepower-hours, and 0.000948451 B.t.u.
Foe (noun)
an armed adversary (especially a member of an opposing military force);
"a soldier must be prepared to kill his enemies"
Foe (noun)
a personal enemy;
"they had been political foes for years"
Joule (noun)
a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second
Joule (noun)
English physicist who established the mechanical theory of heat and discovered the first law of thermodynamics (1818-1889)