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Pound - Wikipedia, the free encyclopedia Pounds are also used for the force definitions of weight, as well as for other forces, in which the pound force is a unit of force equal to 4.448 newtons. Over time, the various keepers of the standards redefined pounds in terms of the metric system (which has happened in case of the avoirdupois and troy pounds as well as the metric pounds), they were defined in terms of the kilogram, not the dyne or the newton. But because the foot-pound-second systems are no longer used in science (and are gradually approaching extinction even in U.S. engineering work), many scientists today would be as bemused by this question as by the question of whether the shekel is a unit of mass or of force. en.wikipedia.org /wiki/Pound   (1976 words)

Weight vs. Mass; What's the Difference? The magnitudes of the measurements of mass and force may be the same, within the limits of the precision of the measurement, at some places on earth if the mass is measured in pounds mass and the force is measured in pounds force, for example. The modern practice is to use pounds and ounces, etc., for the mass units with the symbols lb, oz, etc. If the force units of the same name are used, they should be identified as such (pounds force, ounces force, short tons force, long tons force). The symbol for the pound force is lbf, and the symbol for the ounce force is ozf. ourworld.compuserve.com /homepages/Gene_Nygaard/weight.htm   (4527 words)

PSI For technical accuracy, pressure must be expressed as psig (pounds-force per square inch gauge) or psia (pounds-force per square inch absolute; that is, gauge pressure plus sea level atmospheric pressure, or psig plus approximately 14.7 pounds per square inch). Pounds-force per Square Inch (PSI) is a non-SI unit of pressure. www.fastload.org /ps/PSI.html   (107 words)

Multiplication of Forces In any system with these dimensions, the ratio of output force to input force is always 10 to 1 regardless of the applied force; for example, if the applied force of input piston 1 is 50 pounds, the pressure in the system is increased to 25 psi. This pressure of 10 psi acts on all parts of the fluid container, including the bottom of output piston 2; therefore, the upward force on output piston 2 is 10 pounds for each of its 20 square inches of area, or 200 pounds (10 x 20). This will support a resistant force of 500 pounds on output piston 2. www.tpub.com /basae/66.htm   (315 words)

2853.txt Force: that which changes or tends to change the condition of rest or motion of the body acted upon; it is measured in pounds. Torque: a twisting force measured from the center of rotation Units are Inch Pounds, Foot Pounds, or Newton Meters. Torque is a measure of force exerted to rotate a shaft, where the distance from the center of the shaft and the force are expressed as follows: Torque = Force (lbs.) X Distance from Center (Length) a. www.calaged.org /ResourceFiles/Curriculum/advcluster/2853.txt   (755 words)

Read about Pound-force per square inch at WorldVillage Encyclopedia. Research Pound-force per square inch and learn about Pound-force per square inch here! For technical accuracy, psi must be expressed as psig (pounds-force per square inch gauge) or psia (pounds-force per square inch absolute; that is, gauge pressure plus local atmospheric pressure). Pounds-force per square inch (lbf/in² or PSI) is a non-SI unit of pressure. Gauge pressure can be further subdivided into psivg (psi vented gauge) and psisg (psi sealed gauge), the difference being that psisg measures the difference in psi between a chamber of air sealed at atmospheric pressure and the pressure at the measuring point, while psivg measures the difference between the measuring point and the local pressure. encyclopedia.worldvillage.com /s/b/PSI   (216 words)

Howstuffworks "How a Block and Tackle Works" That means that if you want to hold the weight suspended in the air, you only have to apply 50 pounds of force (the ceiling exerts the other 50 pounds of force on the other end of the rope). You still have to apply 100 pounds of force to keep the weight suspended, and you still have to reel in 100 feet of rope in order to lift the weight 100 feet. The force has been cut in half but the distance the rope must be pulled has doubled. www.howstuffworks.com /pulley.htm   (509 words)

The Ultimate PSI - American History Information Guide and Reference Pounds-force per square inch (PSI) is a non-SI unit of pressure, in which a force of one pound-force is applied to an area of one square inch. For technical accuracy, psi must be expressed as psig (pounds-force per square inch gauge) or psia (pounds-force per square inch absolute; that is, gauge pressure plus sea level atmospheric pressure, or psig plus approximately 14.7 psi). www.historymania.com /american_history/Psia   (189 words)

Uses of Hydraulic Pressure piston with a total force of 10 pounds. Fz = force, in pounds, applied to the large piston; The handle exerts a total force of 15 pounds on www.tpub.com /content/engine/14037/css/14037_68.htm   (319 words)

Units: P A pond is the gravitational force on a mass of one gram; thus it is equal to 980.665 dynes or 0.002 204 622 6 pounds of force. For pounds of force per linear inch, 1 pli = 175.1268 N/m. Dynamic viscosity is measured by stating the force needed to move a standard area of one layer of the liquid or gas with respect to another layer, the two layers being parallel and separated by a standard distance filled with the same liquid or gas. www.unc.edu /~rowlett/units/dictP.html   (9377 words)

NASIOC - lb. ft. OR ft. lbs.??? In the case of the lug nuts, if the wrench is a foot long, and you put 200 pounds of force on it, you are generating 200 pound-feet of torque. This force creates a torque on the lug nut, which tends to turn the lug nut. We are not talking about pressure exerted on an area, which is pounds per square inch (psi) or pounds per square foot. forums.nasioc.com /forums/showthread.php?t=134196   (1133 words)

Conversion Calculators : Convert between various Units of Measure Supported Units: Dyne, gram-force, poundals, newtons, pounds and kgm-force Supported Units: Pounds, Ounces, Kilograms, Troy Pounds, Scruples, Grams, Carats, Pennyweight, Poundals, Stones, Slugs, Quarter, Metric Tons, Short Tons and Long Tons Supported Units: Pound-force Foot, Pound-force Inch, Kilogram-force Meter, and Newton meter² www.sciencelab.com /data/conversion.shtml   (223 words)

Mark Horrell - Pressure and Stress Unit Converter newtons per square millimetre to pounds-force per square inch pounds-force per square inch to newtons per square millimetre 1 newton per square millimetre = 145.037738 pounds-force per square inch www.markhorrell.com /tools/pressure.asp   (180 words)

Units: P A pond is the gravitational force on a mass of one gram; thus it is equal to 980.665 dynes or 0.002 204 622 6 pounds of force. One pound mole of a chemical compound is the same number of pounds as the molecular weight of a molecule of that compound measured in atomic mass units. If a force of one dyne is needed to move one square centimeter of the liquid or gas relative to a second layer one centimeter away at a speed of one centimeter per second, then the viscosity is one poise. www.unc.edu /~rowlett/units/dictP.html   (9377 words)

The Strong Nuclear Force So a pair of protons about 2 fermis apart experiences about 1000 pounds of binding force! An alpha particle feels about 40 pounds of repulsive force between the particles. The carrier of the strong nuclear force in an atomic nucleus is the pion (pi-plus meson). www.geocities.com /quantum_00_2000/4forces/strongforce.html   (431 words)

Pressure, Barometers, & Barometric Pressure What this means is that a force of 30 pounds is exerted on each and every square inch of surface area on the inside of the tire, There are a lot of square inches on the inside surface of a tire, and because of this, the force exerted on the tire is very large. Although the concept of pressure is sometimes used to express the force per unit area between the surfaces of solid objects, in this article, we are more interested in the pressures exerted by liquids and gases. The air in a room 12 ft x 14 ft with an 8-foot ceiling weighs almost exactly 100 pounds. www.challengers101.com /Pressure.html   (3670 words)

Talk:Pound-force per square inch - Wikipedia, the free encyclopedia PSI is an acronym that stands for "pounds per square inch." That is, force per unit area where the force is expressed in units of pounds and the area is expressed in units of square inches. I think I would start by writing this (corrections are welcome): www.wikipedia.org /wiki/Talk:PSI   (161 words)

Bicycle Normal Force in Valley The total normal force on the bicycle wheels must provide the centripetal acceleration to follow the 50 foot radius curved path and support the weight of the boy/bicycle combination. Determine the normal force on both bicycle wheels when he arrives at the bottom of the hill. This times the mass of 3.88 slugs gives the force due to the curved path. www.mcasco.com /qa_bnfiv.html   (254 words)

Usenet Archive Pounds force and kilograms force were NEVER well-defined units > before the 20th century, though they were used in some low-precision > applications. We often > use the acceleration which is official for defining kilograms force, > in conjunction with the well-defined pounds as units of mass, to > define them. Grams force and kilograms force were finally given a > clear definition by the CGPM when they adopted a "standard > acceleration of gravity" of 980.665 m/s^2 for this purpose. usenet2.best-buy-online.com /Dir32/File548.html   (254 words)

physics of knock-down power - Tax and Legal Advice foot-pounds, that is a force of one pound on a lever of one foot. #foot-pounds, that is a force of one pound on a lever of one foot. More importantly, there are no kilograms force in the International www.lawdiscussion.com /archive/t-23179physics_of_knock-down_power.html   (254 words)

Pound-force - Wikipedia, the free encyclopedia It was in 1901 when the CGPM first adopted a standard acceleration of gravity for the purpose of defining grams-force and kilograms-force, a value often borrowed to define pounds-force, though other values such as 32.16 ft/s² (9.80237 m/s²) have been used as well. Though pounds-force had been used in low-precision measurements since the 18th century, they were never well-defined units until the 20th century. The pound-force is equal to a mass of one avoirdupois pound (which is currently defined as exactly 0.45359237 kilogram) multiplied by the standard acceleration due to gravity on Earth. en.wikipedia.org /wiki/Pound-force   (239 words)

The Strong Nuclear Force So a pair of protons about 2 fermis apart experiences about 1000 pounds of binding force! An alpha particle feels about 40 pounds of repulsive force between the particles. The carrier of the strong nuclear force in an atomic nucleus is the pion (pi-plus meson). www.geocities.com /quantum_00_2000/4forces/strongforce.html   (239 words)

Units: F The original version seems to have been equivalent to 2160 avoirdupois pounds, and the version still being used in the nineteenth century was equal to 19.5 hundredweight or 2184 pounds. The footlambert describes the luminance of a surface that emits or reflects one lumen per square foot; it is the luminance of a perfectly reflecting surface under an illumination of one footcandle. Later in the 1100s a foot of modern length, the "foot of St. Paul's," was inscribed on the base of a column of St. Paul's Church in London, so that everyone could see the length of this new foot. www.unc.edu /~rowlett/units/dictF.html   (4889 words)

definition of weight The quality of being heavy; that property of bodies by which they tend toward the center of the earth; the effect of gravitative force, especially when expressed in certain units or standards, as pounds, grams, etc. The quantity of heaviness; comparative tendency to the center of the earth; the quantity of matter as estimated by the balance, or expressed numerically with reference to some standard unit; as, a mass of stone having the weight of five hundred pounds. As, At, Avoirdupois, Balance, Barite, Be, Being, Brass, Business, Center, Clock, Comparative, Consequence, Consideration, Down, Express, Force, Handle, Horse, Hundred, In, Iron, It, Jockey, Lead, Load, Machine, Make, Mass, Matter, Metal, Moment, Number, Observation, Or, Ounce, Paper, Pressure, Property, Quality, Quantity, Race, Reference, Resistance, Scale, See, Standard, Stone, That, To, Troy, Unit, Weight, Which www.brainydictionary.com /words/we/weight239174.html   (4889 words)

Microprocessor Types and Specifications Because of this, some motherboard manufacturers began using Low Insertion Force (LIF) sockets, which typically required only 60 pounds of insertion force for a 169-pin chip. The socket manufacturers found that it typically takes 100 pounds of insertion force to install a chip in a standard 169-pin screw Socket 1 motherboard. As you can imagine, even the low insertion force was relative, and a better solution was needed if the average person was going to ever replace his CPU. www.informit.com /articles/article.asp?p=130978&seqNum=16   (4889 words)

Arnold Publishing - Civil Jet Aircraft Design - Units and Conversion Factors 33), rates of climb in feet per minute (or metres per minute), weights in pounds (or kilograms force), engine thrust in pounds, speed in nautical miles per hour (or kilometres per hour) and pressure in millibars. It is a mass unit which provides a force of 1 pound when it is subjected to an acceleration of 1 ft/sec For example U.S. industries mainly use the old British System of foot, pound force, second and Rankin. www.apnet.com /companions/034074152X/appendices/data-e   (816 words)

Boiler and Steam Basics/Ohio Special Boiler Boiler Horsepower (BHP)- The amount of energy needed to produce 34.5 pounds of steam, per hour, at a pressure and temperature of 0 Psig and 212 ºF, with feedwater at 0 Psig and 212 ºF. This is equivalent to 33,475 BTU/Hr or 8430 Kcal/Hr. First, since the Steam Generator is a forced circulation boiler it can tolerate relatively high TDS levels in the feedwater — as high as 8550 ppm. One Boiler Horsepower (BHP) is, by definition, equivalent to 34.5 pounds of steam per hour, from and at 212 ºF (100 °C). www.claytonindustries.com /1.6.jsp   (2359 words)

ARTICLE: Wallops Island gets Air Force contract (The Virginian-Pilot - HamptonRoads.com/PilotOnline.com) The Air Force Space and Missiles Systems Center Detachment 12, located at Kirtland Air Force Base in Albuquerque, N.M., will launch a series of small vehicles from Wallops with payloads of 2,000 pounds to 4,000 pounds. The Mid-Atlantic Re-gional Spaceport at Wallops Island has won a $49 million contract to launch satellites and space craft for the Air Force over the next five years. ARTICLE: Wallops Island gets Air Force contract (The Virginian-Pilot - HamptonRoads.com/PilotOnline.com) home.hamptonroads.com /stories/story.cfm?story=77733&ran=74265   (2359 words)

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