** File: MathUnit.hlp
** Index: 7

** Content:Math Units and Physical constants


*****  Units for a system of measures  *****
           as used internationally

Quantity Measured    Unit       Abbreviation

Length               meter           m

Mass                 kilogram        kg

Time                 second          s

Electric current     ampere          A

Temperature          degree Kelvin   K

Luminous intensity   candela         cd

Amount of substance  mole            mol


*****  Recommended decimal multiples  *****
          and submultiples

    Multiples
and submultiples     Prefixes       Symbols

  1.0E+18            exa            E

  1.0E+15            pecta          P

  1.0E+12            tera           T

  1.0E+9             giga           G

  1.0E+6             mega           M

  1.0E+3             kilo           k

  1.0E+2             hecto          h

  1.0E+1             deca           da

  1.0E-1             deci           d

  1.0E-2             centi          c

  1.0E-3             milli          m

  1.0E-6             micro          æ

  1.0E-9             nano           n

  1.0E-12            pico           p

  1.0E-15            femto          f

  1.0E-18            atto           a


*** Tables of Measure and Weight Units ***
           the Metric System

                              Ratio to the
   Name         Abbreviation  primary unit

LENGTH

millimicron       mæ            1.0E-9

micron            æ             1.0E-6

centimillimeter   cmm           1.0E-5

decimillimeter    dmm           1.0E-4

millimeter        mm            1.0E-3

centimeter        cm            1.0E-2

decimeter         dm            1.0E-1

meter             m           primary unit

decameter         dam           10

hectometer        hm            100

kilometer         km            1000


AREA

square meter      sq. m.      primary unit

are               a             100

hectare           ha            1.0E+4

square kilometer  sq. km.       1.0E+6


WEIGHT & MASS

milligram         mg            1.0E-6

centigram         cg            1.0E-5

decigram          dg            1.0E-4

gram              g             1.0E-3

decagram          dag           1.0E-2

hectogram         hg            1.0E-1

kilogram          kg          primary unit

quintal           q             100

metric ton        MT (or t)     1000


CAPACITY

microliter        æl            1.0E-6

milliliter        ml            1.0E-3

centiliter        cl            1.0E-2

deciliter         dl            1.0E-1

liter             l           primary unit

deciliter         dal           10

hectoliter        hl            100

kiloliter         kl            1000


** Conversion factors: English to Metric **

To obtain    Multiply        By

Metric       English     Conversion Factor

microns        mils          25.4

centimeters    inches        2.54

meters         feet          0.3048

meters         yards         0.9144

kilometers     miles         1.609344

grams          ounces        28.34952313

kilograms      pounds        0.45359237

liters         gallons       3.785411784

milliliters    fluid ounces  29.57352956

example: 1 inch = 2.54 centimeters


