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Topic: Natural units


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  Units: Customary Units
The mile is a Roman unit, originally defined to be the length of 1000 paces of a Roman legion.
The use of these weight units naturally followed trade routes, since merchants trading along a certain route had to be familiar with the units used at both ends of the trip.
Thus the gallon, the basic English unit of volume, was originally the volume of eight pounds of wheat.
www.unc.edu /~rowlett/units/custom.html   (2279 words)

  
  Planck units - Wikipedia, the free encyclopedia
They form a system of natural units because they are defined exclusively in terms of the following fundamental physical constants — the units are natural because the numerical values of these five universal constants become 1 when expressed in units of this system.
Natural units have the advantage of simplifying many equations in physics by removing conversion factors.
It is a definition of unit charge that is a natural extension of how the other Planck units were defined and is referred to by physicists in some publications.
en.wikipedia.org /wiki/Natural_units   (1484 words)

  
 Natural - Wikipedia, the free encyclopedia
Natural is defined as "of or relating to nature"; this applies to both definitions of 'nature': 'essence' ("one's true nature") and 'the untouched world' ("force of nature").
Natural (♮), in music, is notes A, B, C, D, E, F, and G, as opposed to the sharps/flats.
Natural abundance, in physics, the relative quantities of isotopes found in nature
en.wikipedia.org /wiki/Natural   (407 words)

  
 Station Information - Natural units
Natural units or Planck units are a system of units of measurement based on the fundamental constants:
They eliminate all arbitrariness from the system of units: some physicists believe that an extra-terrestrial intelligence might be expected to use the same system.
These units have the advantage of simplifying many equations in physics by removing conversion factors; for example, Einstein's famous equation becomes simply.
www.stationinformation.com /encyclopedia/n/na/natural_units.html   (424 words)

  
 Natural units
The preferred unit of energy in physics is the the electron volt (or eV for short) is the amount of work necessary to move one electron across a potential of one volt.
This is a very handy unit for particle physicists because particle experiments use electric potentials to accelerate electrons and other particles with that same charge, and bang them into each other.
The Planck length is thought to be the natural distance scale at which quantum gravitational effects become strong enough to notice.
superstringtheory.com /unitsa.html   (591 words)

  
 natural units?? - Physics   (Site not responding. Last check: 2007-10-08)
natural units are used exclusivly in theoretical physics.
natural units have the bizarre property that plancks constant is one unit of action and the speed of light is one unit of speed : h = 1 and c = 1.
> natural units have the bizarre property that plancks constant is one unit of > action and the speed of light is one unit of speed : > h = 1 and c = 1.
www.okka.biz /_natural_units-26159253-288-a.html   (226 words)

  
 Nonrenewable Energy - Natural Gas
The main ingredient in natural gas is methane, a gas (or compound) composed of one carbon atom and four hydrogen atoms.
Natural gas is moved by pipelines from the producing fields to consumers.
Since natural gas demand is greater in the winter, gas is stored along the way in large underground storage systems, such as old oil and gas wells or caverns formed in old salt beds.
www.eia.doe.gov /kids/energyfacts/sources/non-renewable/naturalgas.html   (1316 words)

  
 Planck units   (Site not responding. Last check: 2007-10-08)
They form a system of natural units because they are defined exclusively in terms of the following fundamental physical constants — the units are natural because the numerical values of these five universal constants become 1 when expressed in units of this system.
It is a definition of unit charge that is a natural extension of how the other Planck units were defined and is referred to by physicists in some publications (http://www.arxiv.org/abs/hep-th/0208093).
Because the electromagnetic force between two particles is proportional to the product of the charges of each particle (each which would, in Planck units, be proportional to \sqrt{\alpha} \ ), the strength of the electromagnetic force relative to other fundamental forces is proportional to {\alpha} \ .
www.arikah.net /encyclopedia/Natural_units   (1676 words)

  
 New Metric Fables: comparing natural units with old metric   (Site not responding. Last check: 2007-10-08)
In the units used in the Forbidden City, one of two employed in the Fables, the values of these constants are a millionth, a billion, a trillion, a quadrillionth, and a quintillionth.
The fingerwidth unit was in the ballpark of 10
The foot unit which came down to us from the Romans just happened to be rather close to a billionth of a light-second so that the speed of one foot per second is close to a billionth of the speed of light in vacuum.
www.rhymenet.com /antimetricfables/postscriptmetric.htm   (1957 words)

  
 NaturalGas.org
The most basic natural gas fired electric generation consists of a steam generation unit, where fossil fuels are burned in a boiler to heat water and produce steam, which then turns a turbine to generate electricity.
Natural gas may be used for this process, although these basic steam units are more typical of large coal or nuclear generation facilities.
Because of the extensive natural gas supply infrastructure, and the environmental benefits of using natural gas, it is one of the leading choices for on-site power generation.
www.naturalgas.org /overview/uses_eletrical.asp   (1547 words)

  
 Nothing but Motion: CHAPTER 13
When all quantities are expressed in natural units there are no numerical constants in equations of this kind aside from what we may call structural factors: geometrical factors such as the number of effective dimensions, numerical factors such as the second and third powers of the quantities entering into the relations, and so on.
No significant changes were required in the values of the basic natural units, but some of the details of the manner in which these units enter into the determination of the “constants” and other physical magnitudes have been clarified in the course of extending the development of the theoretical structure.
The magnitudes of the natural units applicable to physical quantities are independent of the sector or region of the universe in which the phenomena to which they relate are located.
www.reciprocalsystem.com /nbm/nbm13.htm   (5953 words)

  
 NIST Guide to SI Units - 5 Units Outside the SI
Certain units that are not part of the SI are essential and used so widely that they are accepted by the CIPM, and thus by this Guide, for use with the SI [2, 3].
The combination of units of this table with SI units to form derived units should be restricted to special cases in order not to lose the advantages of the coherence of SI units.
5.2 Units temporarily accepted for use with the SI Because of existing practice in certain fields or countries, in 1978 the CIPM considered that it was permissible for the units given in Table 9 to continue to be used with the SI until the CIPM considers that their use is no longer necessary [2,3].
physics.nist.gov /Pubs/SP811/sec05.html   (1480 words)

  
 Natural units
Natural units or Planck units are a natural system of units of measurement based on the fundamental constants:
These units have the advantage of simplifying many equations in physics by removing conversion factors.
Although not formally part of the system of Planck units, the following SI derived units are defined naturally.
www.sciencedaily.com /encyclopedia/natural_units   (482 words)

  
 Nature Fables 2: stories in human-scale natural units
There is a set of units built into nature—based on proportions intrinsic to light and gravity—called the natural units or Planck units.
The time unit, likewise scaled by a power of ten to give it a familiar size, comes out to be (within two tenths of a percent) 1/1600 of a day, or nine tenths of a conventional minute.
But for certain kinds of physics calculations it can be fun to switch over to "talent mile units"— units connected to nature and to the proportions built into light and gravity, in terms of which the most important natural constants take on power-of-ten values.
www.planck.com /seriousunits/fables2/preface.htm   (1970 words)

  
 EPA: Federal Register: National Emission Standards for Hazardous Air Pollutants: Oil and Natural Gas Production and ...
Natural gas transmission and storage is being listed as a category of major sources and oil and natural gas production is being listed as a category of area sources in addition to its major source listing.
Glycol dehydration units that are required to use air emission controls would be required to connect each process vent on the glycol dehydration unit to an air emission control system that reduces HAP emissions by 95 percent or greater (or to an outlet concentration of 20 parts per million by volume (ppmv) for combustion devices).
Glycol dehydration units that are required to use air emission controls would be required to connect each process vent on the glycol dehydration unit to an air emission control system that reduces HAP emissions by 95 percent or more or to an outlet concentration of 20 ppmv for combustion devices.
www.epa.gov /fedrgstr/EPA-AIR/1998/February/Day-06/a2714.htm   (16955 words)

  
 Natural Gas Chillers (A.C.)   (Site not responding. Last check: 2007-10-08)
Natural Gas is the fuel of choice and widely used for heating, hot water, cooking, industrial equipment, etc. In addition it can also keep homes, buildings, and other facilities cool during warm weather with significant operating cost savings and lower global emissions than compared to electric alternatives.
Natural gas air conditioning is not new and in fact during the 1930s and 1940s most United States cooling needs were met by natural gas.
The Robur units are available in 3- and 5-ton sizes and operate on the absorption cooling process, a cooling method that has been successfully applied in commercial establishments and industrial processes for years, allowing building owners and industrial managers to take advantage of the reliability and economy of absorption cooling.
www.usgaselectric.com /id36.html   (5043 words)

  
 Type of Housing Unit   (Site not responding. Last check: 2007-10-08)
The use of natural gas by households varied widely among the four different types of housing units (Figure 1).
Natural gas consumption and expenditures were lowest for households that occupied structures with five-or-more units (Figures 2 and 3).
Those units were much smaller than average, had common walls between the units, and required less total energy for heating.
www.eia.doe.gov /emeu/consumptionbriefs/recs/natgas/type.html   (237 words)

  
 Medium Parameters in Natural Units   (Site not responding. Last check: 2007-10-08)
This is best done by experimenting with waves of various length in context of wave injection into and its subsequent extraction from the total field region, as discussed in sections 3 and 3.1.
For a given material we are now going to recalculate its material parameters in natural units and use the results in computations.
Because changing the wavelength of incident light changes the unit of length, we may have to enlarge the grid and adjust the size of metal structures accordingly too.
www-unix.mcs.anl.gov /~meglicki/Metal/node11.html   (512 words)

  
 Follicular Unit Hair Transplantation
Follicular Unit Hair Transplantation is worlds ahead of the standard hair transplant procedure performed by the many of today’s surgeons.
By carefully trimming donor tissue into the naturally occurring follicular units under magnification (using high powered microscopes) the maximum number of intact and undamaged grafts are produced from a given amount of donor tissue.
Recently leading hair transplant surgeons have evolved this follicular unit procedure into a highly refined procedure that is minimally invasive and enables the follicular unit grafts to be placed very close together.
www.hairtransplantnetwork.com /Hair-Loss-Treatments/hair-transplants.asp   (869 words)

  
 BBC - h2g2 - Natural Units - A201745
Natural units are what groups of scientists in a common field of research use to make maths problems easier for themselves, and their work less intelligble to others.
Natural units result from taking a certain physical property or measurement and assigning it a value of 1
Students are usually left in total confusion as to which unit or constant to use in practice, because most professors believe that it is just as important to learn arbitrary notation as it is to understand the topic at hand.
www.bbc.co.uk /dna/h2g2/classic/A201745   (372 words)

  
 Regarding natural units, how can h=c=1, and why is this simplification used?
It is easier than it sounds, since one knows what units the answer must have, and there is only one way to add in h's and c's to make it 'right'.
Now, c has the units of speed, or in 'base' units, length/time, or L/T. h has the units of angular momentum, or in base units it is mass*length*length/time, or ML^2/T. First, we can start by setting c=1.
This would be possible, if we changed the unit of length to be the distance traveled by light in one second, c would be exactly 1.
www.physlink.com /ae116.cfm   (344 words)

  
 Paradoxes Resolved, Origins Illuminated - One universe from the alpha 1/N
The unit I used is either the natural unit, which I defined, or the SI units, where kilogram, meter, second are used.
It is reasonable to assume that you mean for the units of G to move with G to the denominator as it changes sides.
The establishment science community has their natural unit set, which is called Planck Scale, which is obtained by setting the numerical value of HBAR and C as well as G equal to one.
www.metaresearch.org /msgboard/topic.asp?TOPIC_ID=611   (2793 words)

  
 ARC: Natural Resources   (Site not responding. Last check: 2007-10-08)
Natural Resources Management is broadly defined as the art, science and business of managing, conserving and preserving nonrenewable and nonrenewable natural resources such as air, water, land and their biological resources for benefit of present and future generations.
The Natural Resources Department additionally offers the general education student coursework that prepares them to be citizens with a greater appreciation and understanding of our natural resources and current human threats to those resources.
Natural Resourses 7, 24, Geography 6, Geology 8, 12, 18, Biology 8, 15, 18, 21, 23, Anthropology 14.
www.arc.losrios.edu /~tech/forestry.html   (282 words)

  
 Natural Units: Stoney
We can imagine the quantity of mass, but the length and the time are not corresponding to anything of our physical world.
The unity of charge (1 esu, 1 electrostatic unit) is defined as the charge on each of two bodies separated by 1 cm and attracting each other by a force of 1 dyne (1 dyne = 1 g cm s
Fundamental Quantum Cosmological Units and the Quantum Evolution of the Universe
www.jgiesen.de /astro/NaturalUnits/stoney.html   (148 words)

  
 Buy 10 Units Save $10 >10 Units of Dead Sea Salt & Mud Soap - Hand Made, 10 Units of Dead Sea Acne Soap-Mud Soap, 10 ...
SEANERALS Renewal Moisturizer is rich in natural minerals from the Dead Sea, vitamins and UV filter.
This cream rejuvenates skin by assisting the natural renewal process, helps to prevent aging, softens the skin and provides a homogeneous skin texture.
This cream rejuvenates skin by assisting the natural renewal process, helps to prevent dryness and aging, softens the skin and provides a homogeneous skin texture.
www.deadseamineral.com /category.asp?id=10   (648 words)

  
 DQ University - California's Two Year Accredited Tribal College   (Site not responding. Last check: 2007-10-08)
The purpose of the course is to develop a better understanding of the physiological factors which contribute toward alcohol and drug addiction for Indigenous individuals and the effect upon the community and individual.
Various fields of natural science such as physics, chemistry, astronomy, and biology will be surveyed with the objective of their developing association with human consciousness.
An integrated study of the basic principles of biology, including the nature of scientific investigation and characteristics of living things.
www.dqu.cc.ca.us /pages/catalog01-02/programs/naturalsci.html   (1274 words)

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