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Extensive and intensive quantities
An object's heat capacity (symbol C) is defined as the ratio of the amount of heat energy transferred to an object and the resulting increase in temperature of the object,C \equiv \frac{ Q}{\Delta T}, ...
category:    2014-9-8 18:37
C
C is an imperative (procedural) language. It was designed to be compiled using a relatively straightforward compiler, to provide low-level access to memory, to provide language constructs that map eff ...
category:    2014-9-8 18:16
Heat capacity
Before the development of modern thermodynamics, it was thought that heat was an invisible fluid, known as the caloric. Bodies were capable of holding a certain amount of this fluid, hence the term he ...
category:    2014-9-8 18:14
Coulomb
This SI unit is named after Charles-Augustin de Coulomb. As with every International System of Units (SI) unit whose name is derived from the proper name of a person, the first letter of its symbol is ...
category:    2014-9-8 18:13
Complex number
Complex numbers allow for solutions to certain equations that have no solutions in real numbers. For example, the equation(x+1)^2 = -9 \,has no real solution, since the square of a real number cannot ...
category:    2014-9-8 18:06
Maxwell's equations
Like all vector fields, a magnetic field has two important mathematical properties that relates it to its sources. (For B the sources are currents and changing electric fields.) These two properties, ...
category:    2014-9-8 18:05
Magnetic field
Main article: History of electromagnetic theoryOne of the first drawings of a magnetic field, by René Descartes, 1644. It illustrated his theory that magnetism was caused by the circulation of tiny h ...
category:    2014-9-8 18:04
Celsius
In 1742, Swedish astronomer Anders Celsius (1701–1744) created a temperature scale which was the reverse of the scale now known by the name "Celsius": 0 represented the boiling point of water, while ...
category:    2014-9-8 18:01
Luminance
Luminance is often used to characterize emission or reflection from flat, diffuse surfaces. The luminance indicates how much luminous power will be detected by an eye looking at the surface from a par ...
category:    2014-9-8 17:59
B meson
B mesonsParticle Symbol Anti-particle Quarkcontent Charge Isospin(I) Spin and parity(JP) Rest mass(MeV/c2) S C B' Mean lifetime(s) Commonly decays toB meson B+ B? ub +1 1?2 0? 5,279.15±0.31 0 0 +1 ...
category:    2014-9-8 17:57
Work (physics)
The SI unit of work is the joule (J), which is defined as the work expended by a force of one newton through a distance of one metre.The dimensionally equivalent newton-metre (N·m) is sometimes used ...
category:    2014-9-8 17:55
Vector potential
In vector calculus, a vector potential is a vector field whose curl is a given vector field. This is analogous to a scalar potential, which is a scalar field whose gradient is a given vector field.For ...
category:    2014-9-8 17:54
Spectral types
The following illustration represents star classes with the colors very close to those actually perceived by the human eye. The relative sizes are for main-sequence (or "dwarf") stars.Class O Main art ...
category:    2014-9-8 17:53
Blood type
Main article: ABO blood group systemThe ABO system is the most important blood-group system in human-blood transfusion. The associated anti-A and anti-B antibodies are usually immunoglobulin M, abbrev ...
category:    2014-9-8 17:51
Area
See also: Jordan measureAn approach to defining what is meant by "area" is through axioms. "Area" can be defined as a function from a collection M of special kind of plane figures (termed measurable s ...
category:    2014-9-8 17:50

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