PHYSICAL CONSTANTS AND FORMULA

ASTRONOMICAL DATA
SUN

SUN'S RADIUS = 6.960 X 1010 cm (Abell,458), 696,500 Km (S&W)

SOLAR TEMPERATURE = 6,0000 K.

SOLAR PEAK WAVELENGTH = 500 mu (S&W,603)

SOLAR LUMINOSITY = 3.86 X 1033 erg/sec (Abell,458)

SOLAR CONSTANT = 1.36 X 106 erg/cm2-sec (Abell,458)

EARTH

ORBITAL RADIUS FROM SUN = 149.5 X 106 Km (S&W)

SEMI-MAJOR AXIS = 149.5 X 106 Km (Abell,461)

MEAN ORBITAL SPEED = 29.8 Km/sec (Abell,461)

RADIATION FROM SUN AT EARTH'S MEAN DISTANCE = 1.35Kw/m2

GALAXY

DIRECTION OF GALACTIC CENTER: a = 17h 42.4m d = -280 55' (Abell,458)

DIRECTION OF GALACTIC POLE: a = 12h 49m d = +270 4' (Abell,458)

DISTANCE TO GALACTIC CENTER = 10,000 +/-2,000 pc (Abell,340)

(APPROX. 30,000 LY)

SUN'S ORBITAL SPEED = 200 - 300 Km/sec (Abell,340)
 
 

ELEMENTARY PARTICLES

NAME MASS CHARGE

1.6 x 10-19 C

 HALF-LIFE

seconds

 SPIN

h/2p

 Radius 

meters
NEUTRON 1,839 0 760 1/2
PROTON 1,837 1 stable 1/2 0.78x10-15
ANTI-PROTON 1,837 -1 stable 1/2
ELECTRON 1 -1 stable 1/2
POSITRON 1 1 stable 1/2
NEUTRINO 5 X 10-4 0 stable 1/2
PHOTON 0 0 stable 1
Sources: S&W, 625, 899, 900;
 
 

GENERAL PHYSICAL CONSTANTS

STEFAN-BOLTZMANN CONSTANT = s = 5.669 x 10-5 erg/cm2-deg4-sec (Abell,458)

STEFAN-BOLTZMANN CONSTANT = s = 5.669 +/- .001 x 10-8 W/m2- K.deg4-sec

(S&W,Appendix iii, Sect. 1)

QUANTUM ENERGY: E = h x f (S&W,604)

PLANCK'S RADIATION LAW: Wl = (2x p x 10-9 x h x c2)/(l5(ehc/lKT-1) (S&W,604)

l = meters

c = 2.99793 x 108 m/s

k = 1.3804 x 10-23 J/K-deg

h = 6.6252 x 10-34 J-s

e = 2.71828

STEFAN-BOLTZMANN LAW:

wblack = sT4 (T = degrees Kelvin)

CONVERSIONS
LENGTH

METER = 10-3 Km = 39.37" = 3.281 ft = 6.214 X 10-4 mile

ANSTROM = 10-10 meter

MICRON = 10-6 meter

MILLIMICRON (mm) = 10-9 meters

LY = 9.4600 X 1012 Km

PARSEC = 3.084 X 1013 Km

AU = 149.5 X 106 Km

ENERGY

1 JOULE = 9.481 X 10-4 BTU = 2.778 X 10-7 Kwh

1 ERG = 10-7 JOULE

FORCE
coulomb = 9.652 x 104 faraday = is the electric force between two point charges;  proportional to the magnitude of two charges and inversely proportional to the square of the distance between the charge.  F = 8.9876 x 109 Nxm2/C2.  Experimental evidence to date indicates that all charges are integral multiples of these elementary charges.  In nuclear physics, it is convenient to employ an 'atomic' unit of charge called the electronic charge unit and abbreviated e:  This is considered to be the charge on the proton, where 1 e=1.60206 x 10-19 C.