---------Basic Units----------
Mass 		1 lbm == 0.45359237 kg.
                1 Atomic Mass Unit (AMU) == 1/12 mass of carbon atom containing 6 protons + 6 neutrons
                1 AMU = 1.6605402(10)x10-27 kg
                From E=mc^2 we find that 1 AMU=931.494 million electron-volts (MeV)
Length  	0.3048 m== 1 ft==12 inches==1/3 yard
Temperature:	K=C+273.15	R=F+459.7 
		F=(9/5)C+32	C=(5/9)(F-32)
Electric Current 	1 amp (A)= 1 Couloumb/second
Amount of Substance 1 mole has 6.0221367 (*10^23??) molecules
Luminous Intensity
Time: 365 days = 8760 hrs = 525,600 minutes = 31,536,000 seconds
--------Derived Units----------
Velocity == distance/time
Area: 4840 square yards=one acre; 4 rods=one acre; 640 acres = 1 square mile
Acceleration == rate of change of velocity relative to time dv/dt
Volume 1cc=1ml,  1m^2=1000 liter.    
        1 barrel of crude oil is 42 gallons
        1 US gallon = 231 cubic inches (exactly)==128 fluid ounces == 256 tablespoons ==768 teaspoons
Specific Volume == volume/mass
Density == mass/volume: 1g/cc=62.44 lb/ft^3
Force is proportional to mass * acceleration: 1 dyne=1 g.cm./sec^2
        1 N == 1 (kg M)/(s^2) => Force=mass*acceleration
        4.448 N = 1 lb ft
        1=gc=32.17 lbm ft/lbf s^2
Work is proportional to force * distance
Energy is the ability to do work: SI => 1 J== 1 N m ==1 kg m^2 / s^2
        1 BTU = 778.17 ft lbf = 1.06 kJ = 252 cal
        4187 Joules = 1 kcal = 3.968 BTU
        1 eV == energy acquired by a particle with unit charge e when accelerated by electric field across a voltage difference of one volt.
        1 eV = 1.60217733(49)x10^-19C x 1 V = 1.60217733(49)x10^-19 J
        1 erg = 1 dyne*cm
Power is the time rate of work: SI => 1 Watt = 1 J/s => 1 kg m^2 /s^3
        1 hp = 550 ft lbf/sec = 42.4 BTU/min = .7457 kw = 641 kcal/hr
        1 kw = 1 kJ/s = 1.341 hp = 56.9 BTU/min
        1 Volt*Amphere = 1 J/s = 1 Watt = 1 Amp^2*Ohm = 1 Volt^2/Ohm
Pressure = Force per area: SI= 1 Pascal (Pa) = 1 N/m^2 = 1 kg/(m sec^2)
        1 ATM = 16.696 lbf/in^2 = 101,325 Pa = 760 mm Hg= 1055 cm H20
        1 Bar = 10^5 Pascal = 15.5038 lbf/in^2
Viscosicy: 1 Poise= 1kg/(m*sec)  1 cP= 1 g(cm*sec)
Flux: rate(per time) in which something crosses a surface perpendicular to the flow
Reynolds# == density*diamter*velocity/viscosity
N==Flux==Flow/area
Q==Flow Rate==Amount/time
C==Concentration==Amount/volume

Electrical Potential: 1 Volt == 1 Joule/Coulomb==1 Watt/Amp
        1 Watt/Amp = (1 kg m^2)/(s^3*Amp)
Electrical Resistance: 1 Ohm = 1 Volt/Amp
Magnetic Flux: 1 Weber (Wb) = 1 Volt * Sec = m^2kg/s^2A = 1 T*M^2
Magnetic Flux Density = Tesla. a measure of strength of magnetic field in given region.
	t tesla = 1 T = 1 Newton/(Amp*meter)= 1 *10^4 gauss = 1 Weber/m^2
Inductance: 1 Henry (H)= 1 Volt*Sec/Amphere
Capacitance: 1 Farad (F) == 1 Amp*Sec/Volt

------------Contants--------
Universal Gas R= 8.3144 kN m/kmol K = 1544 ft lbf/lbmole R
        =1.987 cal/g-mol-K = 82.05 cm^3-atm/g-mol-K
      At STP (1 ATM & 0 C) 1 mole gas => 22.4 liters
      
Blood: Viscocity=0.03 g/(cm^3)  Lungs:  O2 Cons=250*(310/273)ml/min @BT
       Density= 1.056 g/c^3             CO2 Prod=200*(310/273)ml/min@BT
Water: Viscosity =0.01 cp = 0.01 g/(cm*sec)
Cardiac Output: ave 5 l/min
Turbulent Flow if Reynold # > 2000
Charge on an electron == q=-1.60217733(49) x 10^-19 Coulombs
mass of electron = 9.1093897(54) x 10^-31 kg
mass of protron = 1.6726231(10) x 10^-27 kg
(mass of proton)/(mass of electron) = 1836.152701(37)

----Basic Equations-------
Quadratic x=[-b +/- sqr (b^2 - 4ac)]/2a
Volume of Sphere= (4/3)*pi*r^3
Surface area of Sphere = 4*pi*r^2
Universal Gas Law: pV=nRT where R is Universal Gas Constant (see above)