The laws list
K


k to Kohlrausch's law.


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K.

 k

See Boltzmann constant.
 kelvin; K (after Lord Kelvin, 18241907)

The fundamental SI unit of thermodynamic temperature defined as
1/273.16 of the thermodynamic temperature of the triple point of
water.
 Kelvin effect

See Thomson experiment.
 Kepler's 123 law

Another formulation of Kepler's third law, which relates the
mass m of the primary to a secondary's angular velocity omega and
semimajor axis a:
m o= omega^{2} a^{3}.
 Kepler's laws (J. Kepler)

 Kepler's first law

A planet orbits the Sun in an ellipse with
the Sun at one focus.
 Kepler's second law

A ray directed from the Sun to a planet
sweeps out equal areas in equal times.
 Kepler's third law

The square of the period of a planet's orbit
is proportional to the cube of that planet's semimajor axis;
the constant of proportionality is the same for all planets.
 Kerr effect (J. Kerr; 1875)

The ability of certain substances to differently refract light
waves whose vibrations are in different directions when the
substance is placed in an electric field.
 kilogram; kg

The fundamental SI unit of mass, which is the only SI unit still
maintained by a physical artifact: a platinumiridium bar kept in
the International Bureau of Weights and Measures at Sevres,
France.
 Kirchhoff's law of radiation (G.R. Kirchhoff)

The emissivity of a body is equal to its absorptance at the same
temperature.
 Kirchhoff's laws (G.R. Kirchhoff)

 Kirchhoff's first law

An incandescent solid or gas under high
pressure will produce a continuous spectrum.
 Kirchhoff's second law

A lowdensity gas will radiate an
emissionline spectrum with an underlying emission continuum.
 Kirchhoff's third law

Continuous radiation viewed through a lowdensity gas will
produce an absorptionline spectrum.
 Kirchhoff's rules (G.R. Kirchhoff)

 loop rule

The sum of the potential differences encountered
in a round trip around any closed loop in a circuit is zero.
 point rule

The sum of the currents toward a branch point is
equal to the sum of the currents away from the same branch
point.
 Kirkwood gaps (Kirkwood)

Gaps in the asteroid belt, caused by resonance effects from Jupiter.
Similar gaps exist in Saturn's rings, due to the resonance effects
of shepherd moons.
 Kohlrausch's law (F. Kohlrausch)

If a salt is dissolved in water, the conductivity of the solution
is the sum of two values  one depending on the positive ions and
the other on the negative ions.

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