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Topic: Fundamental quantity

Related Topics

extensive quantities

dimensionless quantity

Intensive quantities

Infinitesimal quantity

Quantity Is Job 1

conserved quantity

bill of quantities

printing quantity

quantity change

time dependent quantity

quantity discounts

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	Fundamental unit - Wikipedia, the free encyclopedia
		In the language of measurement, quantities are quantifiable aspects of the world, such as time, distance, velocity, mass, momentum, energy, and weight, and units are used to describe their measure.
		The traditional fundamental dimensions of physical quantity are mass, length, time, and temperature, but in principle, other fundamental quantities could be used.
		An important basic fact of dimensional analysis is that the fundamental units can be regarded as the basis of a special kind of vector space, the space of all units.
	en.wikipedia.org /wiki/Fundamental_quantity (552 words)

	Quantity - Wikipedia, the free encyclopedia
		Some quantities are such by their inner nature (as number), while others are functioning as states (properties, dimensions, attributes) of things like as heavy and light, long and short, broad and narrow, small and great, or much and little.
		The essential part of mathematical quantities is made up with a collection variables each assuming a set of values and coming as scalar, vectors, or tensors, and functioning as infinitesimal, arguments, independent or dependent variables, or random and stochastic quantities.
		The magnitude of an intensive quantity does not depend on the size, or extent, of the object or system of which the quantity is a property whereas magnitudes of an extensive quantity are additive for parts of an entity or subsystems.
	en.wikipedia.org /wiki/Quantity (1701 words)

	UNITS, PHYSICAL - Online Information article about UNITS, PHYSICAL
		A correlation of these units of quantity of heat with the fundamental units of mass, length and time attended the recognition of the fact that heat was a form of energy; and their quantitative relationships followed from the experimental determinations of the so-called " mechanical equivalent of heat," i.e.
		Professor Giorgi proposes that the four fundamental quantities shall be the units of length, mass, time and electrical resistance, and takes as the concrete units or standards the metre, kilogramme, second and ohm.
		The important quantity in connexion with polar magnets is not a mechanical stress between the free poles of different magnets, but the magnetic flux emanating from, or associating with, them.
	encyclopedia.jrank.org /TUM_VAN/UNITS_PHYSICAL.html (9087 words)

	Units and Dimensions: Measurements: Plus 2 Physics (Site not responding. Last check: 2007-10-03)
		The value n is therefore a ratio between the size of the quantity and the size of the unit for that quantity.
		The fundamental quantities are length, mass, time, temperature, electric current, quantity of substance, solid angle, luminous flux etc. Their units are the fundamental units.
		The DIMENSIONS of a physical quantity are the powers to which the fundamental quantities are raised to define the derived quantity.
	www.plus2physics.com /measurements/study_material.asp (452 words)

	being (Site not responding. Last check: 2007-10-03)
		the thing about the fundamental dimensions is that the units associated with them are not derived from other units as are the "derived" units and the "secondary" dimensions of physical stuff.
		the fact that there are both four fundamental dimesions and four fundamental universal constants of the vacuum, tell us unambiguously that there are a set of four natural units of time, length, mass, and charge to make those four fundamental constants go away (they become 1).
		they were assumed fundamental only to describe the motion of matters in our surrounding, precisely in earth's atmosphere.mass is not anymore fundamental quantity since it has proved to change into energy.
	www.physicsforums.com /showthread.php?t=104111 (3614 words)

	RDF vocabulary for physical properties, quantities and units (Site not responding. Last check: 2007-10-03)
		A volcabulary for fundamental quantity types, such as mass, length, temperature, etc., could be published by a standard laboratory such as NIST or by ISO.
		The physical quantity in example 1 is the union of all the physical quantities within the range in example 2.
		A compound physical quantity is identified with respect to a compound scale by a vector of numeric or text values.
	www.scadaonweb.com /publications/units/2/NOTE-units-2002-05-07.html (3933 words)

	Unit 1. Atmospheric Physics
		Two frequently used quantities of measurement are derived from the fundamental quantity of length—area and volume.
		Force is a quantity derived from the quantities of mass and acceleration.
		As a quantity in physics, pressure is the ratio of force to area.
	www.fas.org /spp/military/docops/afwa/atmos-U1.htm (16784 words)

	Why is current a fundamental quantity and not charge?
		Almost all physics or engineering textbooks have a table of the SI units that are based on six fundamental quantities.
		It seems more likely that the fundamental quantity "electric current" should be replaced by the quantity "charge" and that the fundamental unit should be the coulomb.
		Why does there seem to be some contradiction between the definition of a fundamental quantity (a quantity that can't be described in terms of another quantity) and the definition of electric current?
	www.madsci.org /posts/archives/aug2000/967568621.Ph.q.html (225 words)

	Science of Information Energy
		However, the concept of information has become today just as fundamental entity, and a great work is made to justifying its categorisation as the third fundamental quantity of real world thus because “Information” in fact is one of the intrinsic characteristics of life.
		But till to day the concept of “Information” requires a fundamental science and Society dialog open to a very large reflection, particularly with regard to its definition, and understanding of its basic characteristic features and functions aiming to establish a coherent empirical and theoretical principles for advancing in life sciences contemporary development.
		Certainly to avoid fundamental confusion to all those application of Shannon’s concept of Information it is necessary to underline that it is confined to a non-semantic aspect, this because in principle also Shannon accepts the classical splitting between subject and object of classical mechanics.
	www.edscuola.it /archivio/lre/science_of_information_energy.htm (2243 words)

	SI Base Units (Site not responding. Last check: 2007-10-03)
		There are only a few fundamental units from which the units of all quantities in science can be expressed.
		The fundamental units are defined by a measuring process.
		The meaning of a fundamental quantity is equivalent to the process one uses to associate a number with the current state of that quantity.
	www.ac.wwu.edu /~vawter/PhysicsNet/SymbolIndex/SIUnits/UnitBase.html (61 words)

	THEORY OF DISCRETE ATTRACTORS
		This indicates that quantization threshold is not reached regarding the Coulomb interaction induced quantity of motion buildup that occurs between the nucleus and the incoming photon, a buildup which is obviously totally expended in a totally elastic collision as the pair of materializing particles rebound from the nucleus.
		This quantity of motion is unable to express itself other than as a pressure of each atom against its neighbors, in the direction indicated by the collection of attractors acting on it.
		This added quantity of motion is expressed as a change in the relation that the electron has with the other particles with respect to which it was previously in relative motion.
	www.wbabin.net /physics/michaud.htm (12093 words)

	THEORETICAL PHYSICS: ON THE FUNDAMENTAL CONSTANTS OVER TIME
		Dimensionless parameters include gauge couplings and quantities that, like the ratio of the proton to electron mass, are combinations of dimensioned quantities whose units cancel.
		For example, the value of the mass of the electron in kilograms is based mainly on the combined information from experiments that involve classical mechanical and electromagnetic measurements, the highest precision optical laser spectroscopy, experiments involving trapped electrons, and condensed matter quantum phenomena, together with condensed matter theory and extensive calculations in quantum electrodynamics.
		The Task Group on Fundamental Constants, established by the Committee on Data for Science and Technology in 1969, has published three sets of recommended values of the fundamental constants, one set in 1973, one set in 1986-1987, and the latest in 1999-2000.
	scienceweek.com /2004/sc041119-5.htm (1463 words)

	Re: Why is current a fundamental quantity and not charge?
		However, there are two main reasons for viewing the amp as a fundamental quantity rather than the coloumb.
		One is historical: we were able to perform experiments to measure the amp much much earlier than experiments to measure the charge of an electron.
		The second is an effort in the part of the SI people to have the smallest set of "fundamental" quantities.
	www.madsci.org /posts/archives/aug2000/967568621.Ph.r.html (211 words)

	International System of units and principal conversions unit of measure
		All it is born from the requirement to use common units of measure for the quantification and the measure of the physical quantity, for favor the commercial exchanges and the scientific studies, between persons of the same, or different nation.
		To such sense in 1875, in those of Paris, the single representatives of 17 countries, gathered in order to approve of the CONVENTION on the METER, and consequently to adopt the Units for the Measure of the lengths.
		In the course of the years they have been inserted other fundamental units, until arriving to the 7 fundamental quantity, with the 2 additional units currently in use in International System, multiple and the decimal submultiples, and the other derived units.
	www.themeter.net /principale_e.htm (273 words)

	Introduction to Natural Science Exam 1 (Site not responding. Last check: 2007-10-03)
		FB7) A set value for a fundamental quantity is called a __________________ unit.
		FB10) __________________ is a measurement of a quantity of matter.
		A geologist is attempting to measure the density of an unknown rock.
	www.lcsc.edu /cascade/ns150matthews/exam1.htm (538 words)

	Newton's G or Planck's Length? (Site not responding. Last check: 2007-10-03)
		And yes, here is the paradox: F is a classical quantity, so not c neither h should appear; and R is a relativistic unquantised object, so we do not expect h to appear.
		Still, string theory postulates that the fundamental quantity is lp (or its cousin, Planck force) and the same claim seems to emerge from LQG.
		You can argue that dimensionful quantities are human constructs, but still Planck's Mass seems more fundamental than, say, the kilogram; I expect you notice the difference.
	www.physicsforums.com /showthread.php?p=1032665#post1032665 (1295 words)

	RELATIVISTIC QUANTUM PHYSICS
		It directly follows from relativity that of some of the fundamental units that describe the universe, three are all alternate equivalent manifestations.
		Generally in measurements a quantity to be measured is the measure of the same.
		A quantity of mass is the measure of the same, a quantity of length is the measure of the same, a quantity of energy is the measure of the same...All clocks keep time by measuring some motion.
	web.onetel.com /~tonylance/unified.html (15863 words)

	File /tmp_mnt/vol/q/gruber/ontologies/engineering-math/standard-units.lisp indexed for ontology STANDARD-UNITS
		Each unit-of-measure is defined with its relationship to SI units for the fundamental dimensions.
		In some systems FORCE-DIMENSION is fundamental and MASS-DIMENSION is a derived dimension.
		This Lisp-to-HTML translation was brought to you by François Gerbaux and Tom Gruber
	www-ksl.stanford.edu /htw/dme/thermal-kb-tour/standard-units.lisp.html (234 words)

	Information, science and biology
		These theorems already allow fundamental statements to be made at the level of the code.
		Although matter and energy are necessary fundamental properties of life, they do not in themselves imply any basic differentiation between animate and inanimate systems.
		The Bible has long made it clear that the creation of the original groups of fully operational living creatures, programmed to transmit their information to their descendants, was the deliberate act of the mind and the will of the Creator, the great Logos Jesus Christ.
	www.answersingenesis.org /tj/v10/i2/information.asp (4658 words)

	Theory - Maxwell’s Equations
		To evolve the Maxwell’s equations we start with the fundamental postulates of electrostatics and magnetostatics.
		These fundamental relations are considered laws of nature from which we can build the whole electromagnetic theory.
		From this an electrostatic model and a magnetostatic model are derived only by defining two fundamental vectors, the electric field intensity
	www.sm.luth.se /~urban/master/Theory/2.html (488 words)

	Engineers vs physicists and other scientists
		is a fundamental variable of physics; due to, and proportional to the
		I don't think weight is a fundamental quantity numbskull.
		regardless of which quantity you stick the "fundamental" hat on.
	sci4um.com /about2608.html (2083 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		A detailed study of spin transfer in pp elastic scattering near 200 MeV has been carried out at the Indiana University Cyclotron Facility.
		The new data have much smaller uncertainties than all previous measurements, and span a kinematic range selected specifically to maximize sensitivity to the neutral {pi}NN coupling constant g{sub 0}{sup 2}, a fundamental quantity in nuclear physics whose value remains highly controversial.
		Our results provide strong support for modern potential models of the NN interaction which use a relatively weak pion coupling (g{sub 0}{sup 2}{approx_equal}13.6), but disagree significantly with the predictions of models in which g{sub 0}{sup 2} is {approx}14.4.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=20482130 (332 words)

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