Language-Farnsworth

 view release on metacpan or  search on metacpan

lib/Language/Farnsworth/Units/Standard.pm  view on Meta::CPAN

electronvolt :=        eV;      //   when it is accelerated through 1 V
lightyear :=           c 365.25 day; // The 365.25 day year is specified in
                                    // NIST publication 811
ly :=                  lightyear;
lightsecond :=         c s;
lightminute :=         c min;
parsec :=              au radian / arcsec; // Unit of length equal to distance
pc :=                  parsec;             //   from the sun to a point having
                                           //   heliocentric parallax of 1
                                           //   arcsec (derived from parallax
                                           //   second) The formula should use
                                           //   tangent, but the error is about
                                           //   1e-12.
rydberg :=             h c Rinfinity;      // Rydberg energy
crith :=               0.089885 gram;      // The crith is the mass of one
                                           //   liter of hydrogen at standard
                                           //   temperature and pressure.
amagatvolume :=        molarvolume;
amagat :=  mol/amagatvolume;               // Used to measure gas densities
lorentz :=             bohrmagneton / (h c);// Used to measure the extent
                                           //   that the frequency of light

lib/Language/Farnsworth/Units/Standard.pm  view on Meta::CPAN

gasoline_density := 0.694 g / cm^3; //Density at 300K, according to, http://wiki.answers.com/Q/How_does_temperature_affect_the_density_of_gasoline_or_petrol
natural_gas :=         1.09e6 J/foot^3; // Energy in natural gas
naturalgas :=          natural_gas;
propane :=             9.63e7 J/gallon; // Energy in liquid propane
kerosene :=            1.42e8 J/gallon; // Energy in liquid kerosene
oil :=                 41.868 GJ/metricton;
coal :=                18.20 GJ/metricton;

//
// Permeability: The permeability or permeance, n, of a substance determines
// how fast vapor flows through the substance.  The formula W = n A dP
// holds where W is the rate of flow (in mass/time), n is the permeability,
// A is the area of the flow path, and dP is the vapor pressure difference.
//
// Alan's Veto:  These are damned, damned sketchy, and are going to go.

// perm_0C :=             grain / (hr ft^2 inHg);
// perm_zero :=           perm_0C;
// perm_0 :=              perm_0C;
// perm :=                perm_0C;
//perm_23C :=            grain / (hr ft^2 in-Hg23C);

lib/Language/Farnsworth/Units/Standard.pm  view on Meta::CPAN

// wire gauge systems to add to the confusion.

// The use of wire gauge is related to the manufacturing method: a metal rod is
// heated and drawn through a hole.  The size change can't be too big.  To get
// smaller wires, the process is repeated with a series of smaller holes.  

// American Wire Gauge (AWG) or Brown & Sharpe Gauge appears to be the most
// important gauge. ASTM B-258 specifies that this gauge is based on geometric
// interpolation between gauge 0000, which is 0.46 inches exactly, and gauge 36
// which is 0.005 inches exactly.  Therefore, the diameter in inches of a wire
// is given by the formula 1/200 92^((36-g)/39).  Note that 92^(1/39) is close
// to 2^(1/6), so diameter is approximately halved for every 6 gauges.  For the
// repeated zero values, use negative numbers in the formula.  The same document
// also specifies rounding rules which seem to be ignored by makers of tables.
// Gauges up to 44 are to be specified with up to 4 significant figures, but no
// closer than 0.0001 inch.  Gauges from 44 to 56 are to be rounded to the
// nearest 0.00001 inch.  The table below gives 4 significant figures for all
// gauges.
//
// In addition to being used to measure wire thickness, this gauge is used to
// measure the thickness of sheets of aluminum, copper, and most metals other
// than steel, iron and zinc.

lib/Language/Farnsworth/Units/Standard.pm  view on Meta::CPAN

wire49gauge :=         0.001108 in;
wire50gauge :=         0.0009863 in;
wire51gauge :=         0.0008783 in;
wire52gauge :=         0.0007822 in;
wire53gauge :=         0.0006966 in;
wire54gauge :=         0.0006203 in;
wire55gauge :=         0.0005524 in;
wire56gauge :=         0.0004919 in;

// Next we have the SWG, the Imperial or British Standard Wire Gauge.  This one
// is piecewise linear, so it is not generated by a simple formula.  It was used
// for aluminum sheets.

brwire0000000gauge :=  0.500 in;
brwire000000gauge :=   0.464 in;
brwire00000gauge :=    0.432 in;
brwire0000gauge :=     0.400 in;
brwire000gauge :=      0.372 in;
brwire00gauge :=       0.348 in;
brwire0gauge :=        0.324 in;
brwire1gauge :=        0.300 in;

lib/Language/Farnsworth/Units/Standard.pm  view on Meta::CPAN

brwire49gauge :=       0.0012 in;
brwire50gauge :=       0.0010 in;

// The following is from the Appendix to ASTM B 258
// 
// For example, in U.S. gage, the standard for sheet metal is based on the
// weight of the metal, not on the thickness. 16-gage is listed as approximately
// .0625 inch thick and 40 ounces per square foot (the original standard was
// based on wrought iron at .2778 pounds per cubic inch; steel has almost
// entirely superseded wrought iron for sheet use, at .2833 pounds per cubic
// inch). Smaller numbers refer to greater thickness. There is no formula for
// converting gage to thickness or weight.
// 
// It's rather unclear from the passage above whether the plate gauge values are
// therefore wrong if steel is being used.  Reference [15] states that steel is
// in fact measured using this gauge (under the name Manufacturers' Standard
// Gauge) with a density of 501.84 lb/ft3 = 0.2904 lb/in3 used for steel.
// But this doesn't seem to be the correct density of steel (.2833 lb/in3 is
// closer), and nobody else lists these values.  
//
// This gauge was established in 1893 for purposes of taxation.