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Rules Relative to the Circle
RULES RELATIVE TO THE CIRCLE TO FIND DIAMETER I Multiply circumference by 0.3183. I Or divide circumference by 3.1416. TO FIND CIRCUMFERENCE I Multiply diameter by 3.1416. I Or divide diameter by 0.3183. TO FIND RADIUS I Multiply circumference by 0.15915. I Or divide circumference by 6.28318. TO FIND SIDE OF AN I Multiply diameter by 0.7071. INSCRIBED SQUARE I Or multiply circumference by 0.2251. I Or divide circumference by 4.4428. TO FIND SIDE OF AN I Multiply diameter by 0.8862. EQUAL SQUARE I Or divide diameter by 1.1284. I Or multiply circumference by 0.2821. I Or divide circumference by 3.545. SQUARE I A side multiplied by 1.1442 equals diameter of its circumscribing circle. I A side multiplied by 4.443 equals circumference of its circumscribing circle. I A side multiplied by 1.128 equals diameter of an equal circle. I Square inches multiplied by 1.273 equals circle inches of an equal circle. TO FIND THE AREA OF I Multiply circumference by 1/4 of the diameter. A CIRCLE I Or multiply the square of diameter by 0.7854. I Or multiply the square of circumference by 0.07958. I Or multiply the square of 1/2 diameter by 3.1416. TO FIND THE SURFACE I Multiply the diameter by the circumference. OF A SPHERE OR GLOBE I Or multiply the square of diameter by 3.1416. I Or multiply four times the square of radius by 3.1416. I To find cubic inches in a globe multiply cube of diameter by 0.5236. -
Hp Calculators
hp calculators HP 9s Solving Problems Involving Unit Conversions Metric Units and Imperial Units Unit Conversions on the HP 9s Practice Working Problems Involving Conversions hp calculators HP 9s Solving Problems Involving Unit Conversions Metric units and Imperial units In the Longman Mathematics Handbook (York Press, 1990) the unit is defined as a conventional quantity that is used as a basis for mensuration, which is the study of giving numbers to quantities, that is to say, the act of measuring. There are two major system of units, namely the SI system (Système International d’Unités) and Imperial units. The latter are based on the pound and the yard, and, despite being replaced by the SI system, are still used in Britain and in the USA (with some differences). On the other hand, the SI system is a system based on these seven basic units: kilograms, meters, seconds, amperes, kelvins, moles and candelas. It is often referred to as the metric system, even though the SI system replaced this former system based on the meter and the gram. Metric units are therefore those based on the meter or belonging to a system of units that is based on the meter. Unit conversion is the change between two measurements of the same quantity in different units, and this task plays a lead role in science and engineering. Unit conversions on the HP 9s The HP 9s provides six functions for converting to and from metric units, namely in↔cm (~Ì), gal↔l (~Í), ºF↔ºC (~É), lb↔kg (~Ê), mmHg↔kpa (~Ë) and oz↔g (~Ý). -
Guide for the Use of the International System of Units (SI)
Guide for the Use of the International System of Units (SI) m kg s cd SI mol K A NIST Special Publication 811 2008 Edition Ambler Thompson and Barry N. Taylor NIST Special Publication 811 2008 Edition Guide for the Use of the International System of Units (SI) Ambler Thompson Technology Services and Barry N. Taylor Physics Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899 (Supersedes NIST Special Publication 811, 1995 Edition, April 1995) March 2008 U.S. Department of Commerce Carlos M. Gutierrez, Secretary National Institute of Standards and Technology James M. Turner, Acting Director National Institute of Standards and Technology Special Publication 811, 2008 Edition (Supersedes NIST Special Publication 811, April 1995 Edition) Natl. Inst. Stand. Technol. Spec. Publ. 811, 2008 Ed., 85 pages (March 2008; 2nd printing November 2008) CODEN: NSPUE3 Note on 2nd printing: This 2nd printing dated November 2008 of NIST SP811 corrects a number of minor typographical errors present in the 1st printing dated March 2008. Guide for the Use of the International System of Units (SI) Preface The International System of Units, universally abbreviated SI (from the French Le Système International d’Unités), is the modern metric system of measurement. Long the dominant measurement system used in science, the SI is becoming the dominant measurement system used in international commerce. The Omnibus Trade and Competitiveness Act of August 1988 [Public Law (PL) 100-418] changed the name of the National Bureau of Standards (NBS) to the National Institute of Standards and Technology (NIST) and gave to NIST the added task of helping U.S. -
James Clerk Maxwell
Conteúdo Páginas Henry Cavendish 1 Jacques Charles 2 James Clerk Maxwell 3 James Prescott Joule 5 James Watt 7 Jean-Léonard-Marie Poiseuille 8 Johann Heinrich Lambert 10 Johann Jakob Balmer 12 Johannes Robert Rydberg 13 John Strutt 14 Michael Faraday 16 Referências Fontes e Editores da Página 18 Fontes, Licenças e Editores da Imagem 19 Licenças das páginas Licença 20 Henry Cavendish 1 Henry Cavendish Referência : Ribeiro, D. (2014), WikiCiências, 5(09):0811 Autor: Daniel Ribeiro Editor: Eduardo Lage Henry Cavendish (1731 – 1810) foi um físico e químico que investigou isoladamente de acordo com a tradição de Sir Isaac Newton. Cavendish entrou no seminário em 1742 e frequentou a Universidade de Cambridge (1749 – 1753) sem se graduar em nenhum curso. Mesmo antes de ter herdado uma fortuna, a maior parte das suas despesas eram gastas em montagem experimental e livros. Em 1760, foi eleito Fellow da Royal Society e, em 1803, um dos dezoito associados estrangeiros do Institut de France. Entre outras investigações e descobertas de Cavendish, a maior ocorreu em 1781, quando compreendeu que a água é uma substância composta por hidrogénio e oxigénio, uma reformulação da opinião de há milénios de que a água é um elemento químico básico. O químico inglês John Warltire (1725/6 – 1810) realizou uma Figura 1 Henry Cavendish (1731 – 1810). experiência em que explodiu uma mistura de ar e hidrogénio, descobrindo que a massa dos gases residuais era menor do que a da mistura original. Ele atribuiu a perda de massa ao calor emitido na reação. Cavendish concluiu que algum erro substancial estava envolvido visto que não acreditava que, dentro da teoria do calórico, o calor tivesse massa suficiente, à escala em análise. -
S.I. and Cgs Units
Some Notes on SI vs. cgs Units by Jason Harlow Last updated Feb. 8, 2011 by Jason Harlow. Introduction Within “The Metric System”, there are actually two separate self-consistent systems. One is the Systme International or SI system, which uses Metres, Kilograms and Seconds for length, mass and time. For this reason it is sometimes called the MKS system. The other system uses centimetres, grams and seconds for length, mass and time. It is most often called the cgs system, and sometimes it is called the Gaussian system or the electrostatic system. Each system has its own set of derived units for force, energy, electric current, etc. Surprisingly, there are important differences in the basic equations of electrodynamics depending on which system you are using! Important textbooks such as Classical Electrodynamics 3e by J.D. Jackson ©1998 by Wiley and Classical Electrodynamics 2e by Hans C. Ohanian ©2006 by Jones & Bartlett use the cgs system in all their presentation and derivations of basic electric and magnetic equations. I think many theorists prefer this system because the equations look “cleaner”. Introduction to Electrodynamics 3e by David J. Griffiths ©1999 by Benjamin Cummings uses the SI system. Here are some examples of units you may encounter, the relevant facts about them, and how they relate to the SI and cgs systems: Force The SI unit for force comes from Newton’s 2nd law, F = ma, and is the Newton or N. 1 N = 1 kg·m/s2. The cgs unit for force comes from the same equation and is called the dyne, or dyn. -
Technical Units
Reference: www. rockmass.net 620(7(&+1,&$/81,76 7KH,QWHUQDWLRQDO 6, V\VWHPRIXQLWV Its seven basic units, from which other units are derived, are given in the table below. Dimension Symbol SI unit Comment Name Unit Length l metre m Mass m kilogram kg Time t second s Electric current I ampere A Temperature T kelvin K Luminous intensity Iv candela cd Molar heat capacity n mol mol BASIC UNITS IN SI SYSTEM Angle a radian rad Additional unit Frequency f hertz Hz s-1 Force F newton N 1 N = 1 kgm/s2 Pressure, stress p, σ, pascal Pa 1 Pa = 1 N/m² UNITS Energy, work, heat E, W, Q joule J 1 J = 1 N × m DIVERTED SI- Effect P watt W 1 W = 1 J/s 'HFDGHSUHIL[HV prefix symbol value prefix symbol value tera T 1012 deci d 10-1 giga G 109 centi c 10-2 mega M 106 milli m 10-3 kilo k 103 micro µ 10-6 hecto h 102 nano n 10-9 deca da 101 pico p 10-12 7KH*UHHNDOSKDEHW Α α, ∝ ∗) alpha (a) Ι ι iota (i) Ρ ρ rho (r, rh) Β β beta (b) Κ κ kappa (k) Σ σ sigma (s) Γ γ gamma (g, n) Λ λ lambda (l) Τ τ tau (t) ∆ δ, ∂ ∗) delta (d) Μ µ mu (m) Υ υ upsilon (y, u) Ε ε epsilon (e) Ν ν nu (n) Φ φ, ϕ*) phi (ph) Ζ ζ zeta (z) Ξ ξ xi (x) X χ chi (ch, h) Η η ëta (e, ë) Ο ο omicron (o) Ψ ψ psi (ps) Θ θ, ϑ ∗) theta (th) Π π pi (p) Ω ω omega (o, õ) *) Old-style character 2 9DULRXVXQLWVDQGFRQYHUVLRQV 'LPHQVLRQ 1DPH 6\PERO 8QLW &RQYHUVLRQ Time minute min s 1 h = 60 s hour h h 1 h = 60 min day day day 1 day = 24 h week wk wk 1 wk = 7 days year yr yr 1 yr = 365.242 days = 52.17 wk Length Angstrom A m 1 A = 10-10 m nautical mile n mile 1 n mile = 1852 m wave length λ m Force load G (P,W) N 1 kp = 9.807 N 2 o o 2 gravity g N 1 gn = 9.80665 m/s (exact, at 45 N; at 60 N g = 9.82 m/s ) atmosphere atm 1 atm Modulus elasticity modulus E Pa 1 kPa = 0.1 N/cm = 0.102 ton/m2 deformation modulus G Pa 1 MPa = 10,2 kg/cm2 shear modulus K Pa Density mass density ρ kg/m3 force density γ kN/m3 Flow Lugeon Lugeon l/min/m 1 Lugeon = approx. -
DIMENSIONS and UNITS to Get the Value of a Quantity in Gaussian Units, Multiply the Value Ex- Pressed in SI Units by the Conversion Factor
DIMENSIONS AND UNITS To get the value of a quantity in Gaussian units, multiply the value ex- pressed in SI units by the conversion factor. Multiples of 3 intheconversion factors result from approximating the speed of light c =2.9979 1010 cm/sec × 3 1010 cm/sec. ≈ × Dimensions Physical Sym- SI Conversion Gaussian Quantity bol SI Gaussian Units Factor Units t2q2 Capacitance C l farad 9 1011 cm ml2 × m1/2l3/2 Charge q q coulomb 3 109 statcoulomb t × q m1/2 Charge ρ coulomb 3 103 statcoulomb 3 3/2 density l l t /m3 × /cm3 tq2 l Conductance siemens 9 1011 cm/sec ml2 t × 2 tq 1 9 1 Conductivity σ siemens 9 10 sec− 3 ml t /m × q m1/2l3/2 Current I,i ampere 3 109 statampere t t2 × q m1/2 Current J, j ampere 3 105 statampere 2 1/2 2 density l t l t /m2 × /cm2 m m 3 3 3 Density ρ kg/m 10− g/cm l3 l3 q m1/2 Displacement D coulomb 12π 105 statcoulomb l2 l1/2t /m2 × /cm2 1/2 ml m 1 4 Electric field E volt/m 10− statvolt/cm t2q l1/2t 3 × 2 1/2 1/2 ml m l 1 2 Electro- , volt 10− statvolt 2 motance EmfE t q t 3 × ml2 ml2 Energy U, W joule 107 erg t2 t2 m m Energy w, ϵ joule/m3 10 erg/cm3 2 2 density lt lt 10 Dimensions Physical Sym- SI Conversion Gaussian Quantity bol SI Gaussian Units Factor Units ml ml Force F newton 105 dyne t2 t2 1 1 Frequency f, ν hertz 1 hertz t t 2 ml t 1 11 Impedance Z ohm 10− sec/cm tq2 l 9 × 2 2 ml t 1 11 2 Inductance L henry 10− sec /cm q2 l 9 × Length l l l meter (m) 102 centimeter (cm) 1/2 q m 3 Magnetic H ampere– 4π 10− oersted 1/2 intensity lt l t turn/m × ml2 m1/2l3/2 Magnetic flux Φ weber 108 maxwell tq t m m1/2 Magnetic -
The International System of Units (SI)
NAT'L INST. OF STAND & TECH NIST National Institute of Standards and Technology Technology Administration, U.S. Department of Commerce NIST Special Publication 330 2001 Edition The International System of Units (SI) 4. Barry N. Taylor, Editor r A o o L57 330 2oOI rhe National Institute of Standards and Technology was established in 1988 by Congress to "assist industry in the development of technology . needed to improve product quality, to modernize manufacturing processes, to ensure product reliability . and to facilitate rapid commercialization ... of products based on new scientific discoveries." NIST, originally founded as the National Bureau of Standards in 1901, works to strengthen U.S. industry's competitiveness; advance science and engineering; and improve public health, safety, and the environment. One of the agency's basic functions is to develop, maintain, and retain custody of the national standards of measurement, and provide the means and methods for comparing standards used in science, engineering, manufacturing, commerce, industry, and education with the standards adopted or recognized by the Federal Government. As an agency of the U.S. Commerce Department's Technology Administration, NIST conducts basic and applied research in the physical sciences and engineering, and develops measurement techniques, test methods, standards, and related services. The Institute does generic and precompetitive work on new and advanced technologies. NIST's research facilities are located at Gaithersburg, MD 20899, and at Boulder, CO 80303. -
Metric System Conversion Factors1 J
AGR39 Metric System Conversion Factors1 J. Bryan Unruh, Barry J. Brecke, and Ramon G. Leon-Gonzalez2 Area Equivalents 1 Hectare (ha) 2 1 Acre (A) = 10,000 square meters (m ) 2 = 100 are (a) = 43,560 square feet (ft ) = 2.471 acres (A) = 4,840 square yards (yd2) = 0.405 hectares (ha) 1 Square Foot (ft) = 160 square rods (rd2) 2 = 4,047 square meters (m2) = 144 square inches (in ) = 929.03 square centimeters (cm2) 2 1 Acre-inch (ac-in) = 0.0929 square meters (m ) 3 = 102.8 cubic meters (m ) 1 Square Mile (mi) = 27,154 gallons, US (gal) 2 = 3,630 cubic feet (ft3) = 27,878,400 square feet (ft ) = 3,097,600 square yards (yd2) 2 1 Are (a) = 640 square acres (A ) = 2,589,988.11 square meters (m2) = 100 square meters (m2) 2 = 119.6 square yards (yd ) 1 Square Rod (rd) = 0.025 acre (A) = 39,204 square inches (in2) = 272.25 square feet (ft2) 1 Cubic Foot (ft) 2 3 = 30.25 square yards (yds ) = 1,728 cubic inches (in ) = 25.3 square meters (m2) = 0.037 cubic yards (yds3) 3 = 0.02832 cubic meters (cm ) 1 Square Yard (yd) = 28,320 cubic centimeters (cm3) = 9 square feet (ft2) 2 1 Cubic Yard (yd) = 0.836 square meters (m ) = 27 cubic feet (ft3) = 0.764 cubic meters (m3) 1. This document is AGR39, one of a series of the Environmental Horticulture Department, UF/IFAS Extension. Original publication date November 1993. Revised December 2014. Reviewed December 2017. Visit the EDIS website at http://edis.ifas.ufl.edu. -
Appendix C. General Tables of Units of Measurement
Handbook 44 – 2016 Appendix C – General Tables of Units of Measurement Table of Contents Appendix C. General Tables of Units of Measurement ........................................................ C-3 1. Tables of Metric Units of Measurement ..................................................................................................... C-3 Units of Length ............................................................................................................................................... C-3 Units of Area .................................................................................................................................................. C-3 Units of Liquid Volume .................................................................................................................................. C-4 Units of Volume ............................................................................................................................................. C-4 Units of Mass .................................................................................................................................................. C-4 2. Tables of U.S. Customary Units of Measurement ..................................................................................... C-4 Units of Length ............................................................................................................................................... C-4 Units of Area ................................................................................................................................................. -
The International System of Units (SI) - Conversion Factors For
NIST Special Publication 1038 The International System of Units (SI) – Conversion Factors for General Use Kenneth Butcher Linda Crown Elizabeth J. Gentry Weights and Measures Division Technology Services NIST Special Publication 1038 The International System of Units (SI) - Conversion Factors for General Use Editors: Kenneth S. Butcher Linda D. Crown Elizabeth J. Gentry Weights and Measures Division Carol Hockert, Chief Weights and Measures Division Technology Services National Institute of Standards and Technology May 2006 U.S. Department of Commerce Carlo M. Gutierrez, Secretary Technology Administration Robert Cresanti, Under Secretary of Commerce for Technology National Institute of Standards and Technology William Jeffrey, Director Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. National Institute of Standards and Technology Special Publications 1038 Natl. Inst. Stand. Technol. Spec. Pub. 1038, 24 pages (May 2006) Available through NIST Weights and Measures Division STOP 2600 Gaithersburg, MD 20899-2600 Phone: (301) 975-4004 — Fax: (301) 926-0647 Internet: www.nist.gov/owm or www.nist.gov/metric TABLE OF CONTENTS FOREWORD.................................................................................................................................................................v -
Appendix 9 Updated MIG 0 15.3
Units of Measure [UNECE Recommendation No. 20] Code Description 05 lift 06 small spray 08 heat lot 10 group 11 outfit 13 ration 14 shot 15 stick, military 16 hundred fifteen kg drum 17 hundred lb drum 18 fiftyfive gallon (US) drum 19 tank truck 20 twenty foot container 21 forty foot container 22 decilitre per gram 23 gram per cubic centimetre 24 theoretical pound 25 gram per square centimetre 26 actual ton 27 theoretical ton 28 kilogram per square metre 29 pound per thousand square foot 30 horse power day per air dry metric ton 31 catch weight 32 kilogram per air dry metric ton 33 kilopascal square metre per gram 34 kilopascal per millimetre 35 millilitre per square centimetre second 36 cubic foot per minute per square foot 37 ounce per square foot 38 ounce per square foot per 0,01inch 40 millilitre per second 41 millilitre per minute 43 super bulk bag 44 fivehundred kg bulk bag 45 threehundred kg bulk bag 46 fifty lb bulk bag 47 fifty lb bag 48 bulk car load 53 theoretical kilogram 54 theoretical tonne 56 sitas 57 mesh 58 net kilogram 59 part per million 60 percent weight 61 part per billion (US) 62 percent per 1000 hour 63 failure rate in time 64 pound per square inch, gauge 66 oersted 69 test specific scale 71 volt ampere per pound 72 watt per pound 73 ampere tum per centimetre 74 millipascal 76 gauss 77 milli-inch 78 kilogauss 80 pound per square inch absolute 81 henry 84 kilopound-force per square inch 85 foot pound-force 87 pound per cubic foot 89 poise 90 Saybold universal second 91 stokes 92 calorie per cubic centimetre 93 calorie