]> POSC Units of Measure Dictionary v2.0 2004-03-18 2004-04-22 John Bobbitt File created end of February with review period of 12 days The data in the Units of Measure dictionary are for public use, and may be used by anyone at their own risk. POSC does not guarantee or warrant the information as being correct. 2002-05-29 John Bobbitt Original Release of the dictionary 2004-02-26 John Bobbitt Version 2.0 of the schema allows more information. Also, many additional units were added to fill in needs from other groups. Also added were unit symbols for RP66 units model for many of the units (using the SameUnit element). 2004-03-18 John Bobbitt Review of 2004-02-26 release led to some minor corrections. 2004-04-22 John Bobbitt Review of 2004-03-18 release led to some minor corrections. 2005-02-08 John Bobbitt Changed the meaning of the Authority. They are: SI = Unit is defined in the SI system. POSC = unit added by, and defined by POSC. WITSML = additional unit declared by WITSML 1.2 as being needed. 2005-08-02 John Bobbitt Added two new uoms: dB/km and tonUS/ft2 POSC This document is released as a more comprehensive dictionary of POSC units of measure. It includes the following additions. 1. More units to meet the needs of various groups. 2. Use of SameUnit element to record an RP66 equivalent symbol for the POSC unit. 3. an additional element, DimensionalClass, to give the dimensonality of the unit. 4. More extensive use of the QuantityType, although the listing given is not to be considered complete. The document is backward compatible with previous version 1.0, with the following exceptions: a) DocumentInformation has a slightly different form. b) all elements are in the same namespace. inverse henry reluctance C2T2/L2M POSC 1/H per Kelvin volumetric thermal expansion linear thermal expansion 1/K POSC 1/K per kilogram per mass 1/M POSC 1/kg per metre per length wave number 1/L POSC 1/m per square metre per area 1/L2 POSC 1/m2 per cubic metre per volume 1/L3 POSC 1/m3 per Newton per force T2/LM POSC 1/N WITSML per Pascal bulk compressibility compressibility LT2/M POSC 1/Pa per second per time operations per time frequency 1/T POSC 1/s per Volt per electric potential CT3/L2M POSC 1/V ampere electric current magnetic potential difference magnetomotive force C POSC A The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed 1 metre apart in vacuum,would produce between these conductors a force equal to 2 x 10**-7 newton per metre of length. SI amperes metres squared electromagnetic moment CL2 POSC A.m2 amperes/metre linear electric current density magnetic field strength magnetization C/L POSC A/m amperes/square metre current density C/L2 POSC A/m2 bel level of power intensity 1 POSC B A unit of intensity. A bel is the base 10 logarithm of a power or amplitude ratio. Some systems define a specific base value. POSC bels/metre attenuation per length 1/L POSC B/m bels/octave attenuation 1 POSC B/O The power or amplitude variation that occurs over a doubling of the domain variable. POSC baud data transmission speed 1/s POSC Bd The baud rate is a unit of signaling speed equal to one byte per second. The signaling speed in bauds is equal to the reciprocal of the byte length in seconds. POSC becquerel activity (of radioactivity) 1/T POSC Bq The activity of a radionuclide decaying at the rate of one spontaneous nuclear transition per second SI becquerel per kilogram specific activity (of radioactivity) 1/MT POSC Bq/kg WITSML byte digital storage 1 POSC byte The capacity, in bytes, of a storage device or an information system,is one eighth of the base two logarithm of the number of possible states of the device or system. POSC coulomb electric capacity electric charge electric flux CT POSC C The time integral of electric current,equal to 1 A.s SI coulomb metres electric dipole moment CTL POSC C.m coulomb per kilogram exposure (radioactivity) CT/M POSC C/kg WITSML coulombs/square metre electric polarization CT/L2 POSC C/m2 coulombs/cubic metre charge density CT/L3 POSC C/m3 candela luminous intensity B POSC cd The candela is the luminous intensity, in a given direction,of a source that emits monochromatic radiation of frequency 540 X 10**12 hertz and that has a radian intensity in that direction of 1/683 watt per steradian. SI candelas/square metre luminance B/L2 POSC cd/m2 equivalent electrochemical equivalent CT/N POSC eq The charge contained in one mole of electrons. The amount is equal to 96487 coulombs. equivalent per kilogram equivalent per mass CT/MN POSC eq/kg equivalents per cubic metre equivalent per volume CT/L3N POSC eq/m3 euclid dimensionless volumic concentration mass concentration linear strain shear strain attenuation poisson ratio 1 POSC Euc A base unit to describe all dimensionless values,such as ratios and factors. POSC farad capacitance C2T4/L2M POSC F The capacitance of a capacitor between the plates of which there appears a difference of potential of 1 V when it is charged by a quantity of electricity equal to 1 C. SI farads/metre permittivity C2T4/L3M POSC F/m gas unit volumic concentration POSC gu Can mean 1/50th per cent or 1/100th percent,depending on country. API gamma ray units gamma ray API unit U POSC gAPI A unit defined by the American Petroleum Institute for gamma ray log measurements. API gray absorbed dose L2/T2 POSC Gy The absorbed dose when the energy per unit mass imparted to matter by ionizing radiation is 1 J/kg SI henry self inductance permeance L2M/C2T2 POSC H The inductance of a closed circuit in which an electromotive force of 1 V is produced when the electric current in the circuit varies uniformly at a rate of 1 A/s. SI henries/metre magnetic permeability LM/C2T2 POSC H/m hertz frequency 1/T POSC Hz The frequency of a periodic phenomenon of which the period is 1 second. SI joule moment of force moment of couple torque energy work L2M/T2 POSC J The work done when the point of application of a force of 1 N is displaced a distance of 1 m in the direction of the force. SI joules per delta kelvin heat capacity L2M/KT2 POSC J/K joules/kilogram specific energy L2/T2 POSC J/kg joules/kilogram degree kelvin specific heat capacity massic heat capacity L2/KT2 POSC J/kg.K joules/cubic metre normal stress shear stress modulus of elasticity shear modulus modulus of rigidity bulk modulus modulus of compression electromagnetic energy density radiant energy density M/LT2 POSC J/m3 joules/mole molar thermodynamic energy chemical potential affinity of a chemical reaction L2M/NT2 POSC J/mol joules/mole degree kelvin molar heat capacity molar entropy molar gas constant L2M/KNT2 POSC J/mol.K kelvin thermodynamic temperature delta temperature K POSC K The kelvin, unit of thermodynamic temperature,is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. SI kelvin metres squared/watt thermal insulance coefficient of thermal insulation KT3/M POSC K.m2/W degrees kelvin/metre temperature per length K/L POSC K/m kelvin per second temperature per time K/T POSC K/s WITSML delta kelvin per watt thermal resistance KT3/L2M POSC K/W kilogram mass M POSC kg The kilogram is the unit of mass (not force); it is equal to the mass of the international prototype of the kilogram. SI meter-kilogram mass length ML POSC kg.m WITSML kilogram metres/second momentum impulse LM/T POSC kg.m/s kilogram metres squared moment of inertia L2M POSC kg.m2 kilograms/joule mass per energy T2/L2 POSC kg/J kilograms/metre linear density linear mass mass per length M/L POSC kg/m kilograms/square metre surface density areic mass M/L2 POSC kg/m2 kilograms/square metre seconds mass per time per area M/L2T POSC kg/m2.s kilograms/cubic metre density mass density volumic mass M/L3 POSC kg/m3 kilogram/metre fourth mass per volume per length M/L4 POSC kg/m4 kilograms/second mass flow rate M/T POSC kg/s lumen luminous flux BS POSC lm The luminous flux emitted in a solid angle of 1 sr by a point source having a uniform intensity of 1 cd. SI lumen second quantity of light BST POSC lm.s lumens/watt luminous efficacy BST3/L2M POSC lm/W lux illuminance BS/L2 POSC lx The illuminance produced by a luminous flux of 1 lm uniformly distributed over a surface of 1 m2. SI lux seconds light exposure BST/L2 POSC lx.s metre length breadth height depth thickness radius radius of curvature Cartesian coordinates diameter length of path distance wavelength mean free path L POSC m The metre is the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton-86 atom. SI metres/degree kelvin length per temperature L/K POSC m/K metres/second velocity L/T POSC m/s metres/second squared acceleration linear L/T2 POSC m/s2 square metres area L2 POSC m2 square metres/kilogram mass attenuation coefficient L2/M POSC m2/kg square metres/mol cross section absorption L2/N POSC m2/mol square metres/second Pascal unit productivity index mobility L3T/M POSC m2/Pa.s square metres/second kinematic viscosity thermal diffusivity diffusion coefficient area per time L2/T POSC m2/s cubic metres volume L3 POSC m3 cubic metres/joule isothermal compressibility LT2/M POSC m3/J cubic metres/kilogram specific volume massic volume L3/M POSC m3/kg cubic metres/mole molar volume L3/N POSC m3/mol cubic metres/second pascal productivity index L4T/M POSC m3/Pa.s (cubic metres/second) per pascal productivity index L4T/M WITSML m3/Pa/s WITSML cubic metres/pascal second squared specific productivity index L5T2/M2 POSC m3/Pa2.s2 cubic metres/second volume flow rate L3/T POSC m3/s cubic metres/seconds squared volume per time per time L3/T2 POSC m3/s2 cubic metres/std cubic metres, 0 deg C volume per standard volume 1 POSC m3/scm(0C) cubic metres/std cubic metres, 15 deg C volume per standard volume 1 POSC m3/scm(15C) metres fourth second moment of area moment of section L4 POSC m4 metres fourth/second volume length per time L4/T POSC m4/s mole amount of substance N POSC mol The mole is the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12. When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles,or specified groups of such particles. SI moles/square metre mole per area N/L2 POSC mol/m2 moles/square metre second mole per time per area N/L2T POSC mol/m2.s moles/cubic metre concentration of B amount of a substance N/L3 POSC mol/m3 moles/second mole per time N/T POSC mol/s newton force LM/T2 POSC N That force which, when ap0plied to a body having a mass of 1 kg,gives it an acceleration of 1 m/s2. SI newton square metres force area L3M/T2 POSC N.m2 newtons/metre force per length energy per area M/T2 POSC N/m newtons/cubic metre force per volume pressure per length M/L2T2 POSC N/m3 newtons fourth metres/kilogram parachor M3/L3T8 POSC N4/kg.m7 API neutron units neutron API unit U POSC nAPI A unit defined by the American Petroleum Institute for neutron log measurements. API octave frequency interval 1 POSC O The number of octaves between two positive values is the base two logarithm of their ratio. POSC ohm resistance impedance L2M/C2T3 POSC ohm The electric resistance between two points of a conductor when a constant difference of potential of 1 V, applied between these two points, produces in this conductor a current of 1 A,this conductor not being the source of any electromotive force. SI ohm metre electrical resistivity L3M/C2T3 POSC ohm.m ohm per metre resistivity per length LM/C2T3 POSC ohm/m WITSML pascal force per area pressure M/LT2 POSC Pa The pressure or stress of 1 N/m2. SI pascal seconds dynamic viscosity mass per time per length M/LT POSC Pa.s pascal seconds/cubic metre pressure time per volume acoustic impedance M/L4T POSC Pa.s/m3 pascal second /cubic metre squared nonDarcy flow coefficient M/L7T POSC Pa.s/m6 pascals/metre force per volume pressure per length M/L2T2 POSC Pa/m pascals/cubic metre Darcy flow coefficient M/L4T2 POSC Pa/m3 pascal/ second pressure per time M/LT3 POSC Pa/s pascal squared pressure squared M2/L2T4 POSC Pa2 pH pH 1 POSC pH The negative,base 10 logarithm of the concentration of hydrogen ions in a solution. POSC radian plane angle A POSC rad The radian is the plane angle between two radii of a circle that cut of, on the circumference,an arc equal in length to the radius. SI radians/metre angle per length A/L POSC rad/m radians per cubic metre angle per volume A/L3 POSC rad/m3 WITSML radians/second angular velocity rotational frequency circular frequency angle per time rotational velocity A/T POSC rad/s radians/second squared angular acceleration A/T2 POSC rad/s2 siemens electric conductance admittance susceptance C2T3/L2M POSC S The electric conductance of a conductor in which a current of 1 A is produced by an electric potential difference of 1 V. SI second time T POSC s The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom. SI siemens/metre conductivity C2T3/L3M POSC S/m seconds/metre time per length slowness interval transit time T/L POSC s/m seconds/cubic metre time per volume T/L3 POSC s/m3 standard cubic metres at 0 deg Celsius standard volume M3 POSC scm(0C) A unit of standard volume. The number of scm(0C) of a fluid is the volume the fluid will occupy (in cubic metres) when the fluid is reduced to standard conditions of 1 atm.,0 degrees Celsius. API std cubic metres, 0 deg C/square metre standard volume per area M POSC scm(0C)/m2 std cubic metres, 0 deg C/cubic metre standard volume per volume 1 POSC scm(0C)/m3 standard cubic metres at 15 deg Celsius standard volume M3 POSC scm(15C) A unit of standard volume. The number of scm(15C) of a fluid is the volume the fluid will occupy (in cubic metres) when the fluid is reduced to standard conditions of 1 atm.,15 degrees Celsius. API std cubic metres, 15 deg C/square metre standard volume per area M POSC scm(15C)/m2 std cubic metres, 15 deg C/cubic metre stadard volume per volume 1 POSC scm(15C)/m3 std cubic metres, 15 deg C/second standard volume per time M3/T POSC scm(15C)/s steradian solid angle S POSC sr The steradian is the solid angle that, having its vertex in the center of a circle,cuts of an area of the surface of the sphere equal to that of a square with sides of length equal to the radius of the sphere. SI sievert dose equivalent L2/T2 POSC Sv The dose equivalent when the absorbed dose of ionizing radiation multiplied by the dimensionless factors Q (quality facot) and N (product of any othe multiplying factors) stipulated by the Intl. Commission on Radiological Protection is 1. J/kg. SI sievert per second dose equivalent rate L2/T3 POSC Sv/s The dose equivalent rate when the absorbed dose per second of ionizing radiation multiplied by the appropriate factors is equivalent to 1 Sievert per second. tesla magnetic induction magnetic flux density M/CT2 POSC T The magnetic flux density of 1 Wb/m2. Alternatively, it is defined as the magnetic flux density that produces on a 1-m length of wire carrying a current of 1A, oriented normal to the flux density, a force of 1 N,magnetic flux density being defined as an axial vector quantity such that the force exerted on an element of current is equal to the vector product of this element and the magnetic flux density. SI volt electric potential L2M/CT3 POSC V The difference of electric potential between two points of a conductor carrying a constant current of 1 A when the power dissipated between these points is equal to 1 W. SI volts/Bel potential difference per per power drop L2M/CT3 POSC V/B volts/metre electric field strength LM/CT3 POSC V/m watt power heat flow rate L2M/T3 POSC W The power that represents a rate of energy transfer of 1 J/s. SI Watts per delta kelvin thermal conductance L2M/KT3 POSC W/K watts/metre kelvin energy length per time area temperature thermal conductivity LM/KT3 POSC W/m.K watts/square metre density of heat flow rate poynting vector radiant energy fluence rate radiant exitance irradiance sound intensity energy fluence rate M/T3 POSC W/m2 watts/square metre kelvin heat transfer coefficient M/KT3 POSC W/m2.K watts/square metre steradian radiance M/ST3 POSC W/m2.sr watts/cubic metre power per volume M/LT3 POSC W/m3 watts/cubic metre kelvin volumetric heat transfer coefficient M/KLT3 POSC W/m3.K watts/steradian radiant intensity L2M/ST3 POSC W/sr weber magnetic flux L2M/CT2 POSC Wb The magnetic flux which, linking a circuit of one turn,produces in it an alectromotive orce of 1 V as it is reduced to zero at a uniform rate in 1 s. SI weber metres magnetic dipole moment L3M/CT2 POSC Wb.m webers/metre magnetic vector potential LM/CT2 POSC Wb/m percent dimensionless area per area volumic concentration mass concentration force per force linear strain relative elongation relative power length per length 1 POSC % 0.01 per annum per time 1/T POSC 1/a 1 31558150 per angstrom per length wave number 1/L POSC 1/angstrom 10000000000 per bar bulk compressibility compressibility LT2/M POSC 1/bar 0.000001 per barrel per volume 1/L3 POSC 1/bbl 1 0.1589873 per centimetre per length wave number 1/L POSC 1/cm 100 per day per time 1/T POSC 1/d 1 86400 per degree Celsius volumetric thermal expansion 1/K POSC 1/degC 1 per degree Fahrenheit volumetric thermal expansion 1/K POSC 1/degF 9 5 per degree Rankine volumetric thermal expansion 1/K POSC 1/degR 9 5 per foot per length 1/L POSC 1/ft 1 0.3048 per square foot per area 1/L2 POSC 1/ft2 1 0.09290304 per cubic foot per volume 1/L3 POSC 1/ft3 1 0.02831685 per gram per mass 1/M POSC 1/g 1000 per UK gallon per volume 1/L3 POSC 1/galUK 1 0.00456092 per US gallon per volume 1/L3 POSC 1/galUS 1 0.003785412 per hour per time 1/T POSC 1/h 1 3600 per inch per length 1/L POSC 1/in 1 0.0254 per square kilometre per area 1/L2 POSC 1/km2 1 1000000 per kilopascal bulk compressibility compressibility LT2/M POSC 1/kPa 0.001 per litre per volume 1/L3 POSC 1/L 1000 per pound force per force T2/LM POSC 1/lbf 1 4.448222 per pound per mass 1/M POSC 1/lbm 1 0.4535924 per mile per length 1/L POSC 1/mi 1 1609.344 per square mile per area 1/L2 POSC 1/mi2 1 2589988.11 per minute per time 1/T POSC 1/min 1 60 per millimetre per length wave number 1/L POSC 1/mm 1000 per nanometre per length wave number 1/L POSC 1/nm 1000000000 per pico pascal bulk compressibility compressibility LT2/M POSC 1/pPa 1000000000000 per pounds/square inch bulk compressibility compressibility LT2/M POSC 1/psi 1 6894.757 per micro pounds per square inch bulk compressibility compressibility LT2/M POSC 1/upsi 1 0.006894757 per microvolt per electric potential CT3/L2M POSC 1/uV 1000000 per week per time 1/T POSC 1/wk 1 604800 per yard per length 1/L POSC 1/yd 1 0.9144 thousand cubic feet volume L3 POSC 1000ft3 28.316846592 thousand cubic feet per barrel volume per volume 1 POSC 1000ft3/bbl 28.316846592 0.1589873 thousand cubic feet per day volume flow rate L3/T POSC 1000ft3/d 28.31685 86400 thousand cubic feet per day per foot volume per time per length L2/T POSC 1000ft3/d.ft 92.90304 86400 thousand cubic feet per day per psi productivity index L4T/M POSC 1000ft3/psi.d 28.31685 595707004.8 thousand cubic metres per day volume flow rate L3/T POSC 1000m3/d 1000 86400 thousand cubic meter per day per meter volume per time per length L2/T POSC 1000m3/d.m 1000 86400 thousand cubic metres per hour volume flow rate L3/T POSC 1000m3/h 1000 3600 thousand cubic meters per hour per meter volume per time per length L2/T POSC 1000m3/h.m 1000 3600 thousand (cubic meter per day)-meter volume length per time L4/T POSC 1000m4/d 1000 86400 100000 years time T POSC 100ka 3155815000000 ten thousand kilograms per cubic metre density mass density volumic mass M/L3 POSC 10Mg/m3 10000 annum time T POSC a 31558150 Ampere hour electric capacity electric charge electric flux CT POSC A.h 3600 ampere per square centimeter current density C/L2 POSC A/cm2 10000 ampere per square foot current density C/L2 POSC A/ft2 1 0.09290304 Ampere/millimetre linear electric current density magnetic field strength magnetization C/L POSC A/mm 1000 Ampere/square millimetre current density C/L2 POSC A/mm2 1000000 acre area L2 POSC acre 4046.873 acre foot volume L3 POSC acre.ft 1233.489 acre feet/million stbs, 60 deg F volume per standard volume 1 POSC acre.ft/MMstb 1233.489 158987.3 attogram mass M POSC ag 1E-021 attojoule energy work L2M/T2 POSC aJ 1E-018 Angstrom length L POSC angstrom 0.0000000001 Technical atmosphere force per area pressure M/LT2 POSC at 98066.5 Atmosphere force per area pressure M/LT2 POSC atm 101325 Atmospheres per ft force per volume pressure per length M/L2T2 POSC atm/ft 101325 0.3048 atmosphere per hour pressure per time M/LT3 POSC atm/h 101325 3600 Atmospheres per hundred metre force per volume pressure per length M/L2T2 POSC atm/hm 101325 100 Atmospheres/metre force per volume pressure per length M/L2T2 POSC atm/m 101325 barn area L2 POSC b 1E+028 barns/cubic centimetre area per volume 1/L POSC b/cm3 1E+034 barns/electron cross section absorption L2/N POSC b/elec 0.00006023 bar force per area pressure M/LT2 POSC bar 100000 bar per hour pressure per time M/LT3 POSC bar/h 100000 3600 bar per kilometer force per volume pressure per length M/L2T2 POSC bar/km 100 bar per meter force per volume pressure per length M/L2T2 POSC bar/m 100000 bar squared pressure squared M2/L2T4 POSC bar2 10000000000 bar squared per centipoise pressure squared per (dynamic viscosity) M/LT3 POSC bar2/cP 1.E+13 barrel volume L3 POSC bbl 0.1589873 barrel per hundred barrel volume per volume 1 POSC bbl/100bbl 0.01 barrels/acre volume per area L POSC bbl/acre 0.1589873 4046.879 barrel/acre foot volume per volume 1 POSC bbl/acre.ft 0.1589873 1233.489 barrel/barrel volume per volume 1 POSC bbl/bbl 1 barrels/centiPoise day psi specific productivity index L5T2/M2 POSC bbl/cP.d.psi 0.1589873 595707 barrel/day volume flow rate L3/T POSC bbl/d 0.1589873 86400 barrels/day acre foot volume per time per volume 1/T POSC bbl/d.acre.ft 0.1589873 106573450 barrels/day foot volume per time per length L2/T POSC bbl/d.ft 0.1589873 26334.72 barrels/day foot pounds/sq in unit productivity index L3T/M POSC bbl/d.ft.psi 0.000000000266888418 0.3048 barrel/day pounds/square inch productivity index L4T/M POSC bbl/d.psi 2 0.000000000266888418 barrels/day per day volume per time per time L3/T2 POSC bbl/d2 0.0000000000212978 barrel/foot volume per length L2 POSC bbl/ft 0.1589873 0.3048 barrel per cubic foot volume per volume 1 POSC bbl/ft3 0.1589873 0.02831685 barrel/hour volume flow rate L3/T POSC bbl/hr 0.1589873 3600 barrels/hour/hour volume per time per time L3/T2 POSC bbl/hr2 0.1589873 12960000 barrel/inch volume per length L2 POSC bbl/in 0.1589873 0.0254 barrel per thousand cubic feet volume per volume 1 POSC bbl/k(ft3) 0.1589873 28.31685 barrel per day per kilopascal productivity index L4T/M POSC bbl/kPa.d 0.1589873 86400000 barrel per million cubic feet volume per volume 1 POSC bbl/M(ft3) 0.1589873 28316.85 barrel/mile volume per length L2 POSC bbl/mi 0.1589873 1609.344 barrel per minute volume flow rate L3/T POSC bbl/min 0.1589873 60 barrels/million std cubic feet, 60 degF volume per stancard volume 1 POSC bbl/MMscf(60F) 0.1589873 28262.357 barrel per day per psi productivity index L4T/M POSC bbl/psi.d 0.1589873 595707004.8 barrels/stock tank barrel, 60 deg F volume per standard volume 1 POSC bbl/stb(60F) 1 barrel per U.K. ton specific volume massic volume L3/M POSC bbl/tonUK 156.4763 barrel per U.S. ton specific volume massic volume L3/M POSC bbl/tonUS 175.2535 billion cubic feet volume L3 POSC bcf 28316850 bit digital storage 1 POSC bit 1 8 British thermal unit energy work L2M/T2 POSC Btu 1055.056 Btus/hour foot squared deg F per inch energy length per time area temperature LM/KT3 POSC Btu.in/hr.ft2.F 0.1442279 million Btus/hour heat flow rate L2M/T3 POSC Btu(million)/hr 2 293071.1 British thermal units/barrel normal stress shear stress modulus of elasticity shear modulus modulus of rigidity bulk modulus modulus of compression electromagnetic energy density radiant energy density M/LT2 POSC Btu/bbl 1055.056 0.1589873 Btus/brake-horsepower hour relative power 1 POSC Btu/bhp.hr 0.0003930148 British thermal units/cubic foot normal stress shear stress modulus of elasticity shear modulus modulus of rigidity bulk modulus modulus of compression electromagnetic energy density