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In [[science]], a '''physical constant''' is a number ([[physical quantity]]) that does not change. This is different from a [[mathematical constant]] There are many physical constants in science. Some famous ones are the [[speed of light]], [[Planck ...

There is no physical significance for moment of inertia. It is just a mathematical expression us [[Category:Physical quantity]] ...

...tration''', or '''molarity''', or simply [[concentration]], is a term in [[physical chemistry]]. It measures the concentration of a [[solution]] or [[mixture]] The [[reciprocal]] quantity represents the [[dilution]] (volume) which can appear in Ostwald's [[law of ...

...e value is 1. This allows physicists to simplify many [[equation]]s about physical law. Planck proposed these units in 1899. They are also known as ''natural ...use they simplify several recurring [[algebra|algebraic expression]]s of [[physical law]]. They are particularly relevant in research on unified theories such ...

...gular frequency is the [[Magnitude (mathematics)|magnitude]] of the vector quantity ''[[angular velocity]]'' which is also known as the '''angular frequency v ...reas of maths and science as it allows understanding of many properties of physical objects in our world. In [[SI]] units, angular frequency is measured in [[r ...

...[scalar]], meaning the direction of the force does not affect the physical quantity. ...

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...is solvable, the square root of -1 could not be represented by a physical quantity of any objects in real life. ...

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...of the [[mass]] (m) and [[velocity]] (v) of the object. It is a [[vector]] quantity, which has both direction and magnitude. Its unit is ''kg m/s'' (kilogram m [[Category:Physical quantity]] ...

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..., but he won the 1903 [[Nobel Prize in Chemistry]], and was a founder of [[physical chemistry]]. ...nia]]) several lectures, to try and show the application of the methods of physical chemistry to the study of the theory of [[toxin]]s and [[antitoxin]]s, and ...

==Physical Structure== ...interest in drug purity investigation because it requires samples with low quantity (1-2mg) and is considerably fast in terms of analysis time<ref>Michael H. C ...

Objects of known brightness are called ''standard candles''. Most physical distance indicators are standard candles. These are objects which belong to ...ghtness of an object is given in terms of its [[absolute magnitude]]. This quantity is derived from the [[logarithm]] of its luminosity as seen from a distance ...

...[[product (mathematics)|product]] of a [[number|numerical value]] and a [[physical unit]], not just a number. The dot product is also a scalar in this sense, ...

...[[time]]; energy conservation is a result of the empirical fact that the [[Physical law|laws of physics]] do not change with time itself. Philosophically, this was conserved so long as the masses did not interact. He called this quantity the ''[[vis viva]]'' or ''living force'' of the system. The principle repre ...