data entry sample *** Return to Form ***

JavaScript mathematical functions which are implemented *** Return to Form ***

• pow {pow(x,y) = x ^y }
• sqrt {square root function}
• sin, cos, tan {trig functions}
• asin, acos, atan {inverse trig functions}
• ceil, floor, round {convert-to-integer functions}
• exp {exp(x) = e ^x }
• log {base e; for log _b (x), use log(x)/log(b)}
• max, min {two arguments required}
• random {random number generator}
• abs {absolute value function}

constants (values obtained from various sources) *** Return to Form ***

• a = 1.49597870E8 km astronomic unit
• amu = 1.6605402E-27 kg atomic mass unit
• c = 2.99792458E8 m/sec speed of light
• e = 2.71828182845904 the base of natural logarithms
• ec = 1.602176487E-19 coulombs or J/eV electron charge
• e0 = 8.854187817E-12 F/m permittivity constant
• G = 6.67259E-11 N-(m/kg)^2 gravitational constant
• hc = 12398.53 eV-angstroms photon energy/wvl conversion
• h = 6.6260755E-34 J-sec Planck's constant
• k = 1.380658E-23 J/K Boltzmann's constant
• n = 6.0221367E23 particles Avagadro's number
• m0 = 1.2566370614E-6 H/m permeability constant
• me = 9.1093897E-31 kg electron mass
• pi = atan(1.0)*4.0 circumference / diameter
• deg = pi/180 converts degrees->radians, e.g., sin(30*deg)=.5