Mathematical Constants π, Archimedes' constant 3.141 Circumference of a disc with unit diameter. e, Euler number 2.718 Base of natural logarithms. γ, Euler-Mascheroni constant 0.577 Limit[n→∞]{(1+1/2+1/3+...1/n) - ln(n)} √2, Pythagora's constant 1.414 Diagonal of a square with unit side. Φ, Golden ratio 1.618 Φ = (√5 + 1)/2 = 2.cos(π/5). Diagonal of a unit side pentagon. φ, Inverse golden ratio 0.618 φ = 1/Φ = Φ -1 =(1-φ)/φ or φ = (√5 - 1)/2. δs, Silver ratio / mean 2.414 δs = 1+√2.
Conversion Factors For Pressure 1Pa = 1Nm-2 = 1kgm-1s-2) (lbf/ft2) to Pa: 4.78803E1 (mmHg) to Pa: 1.33322E2 (1.00000 torr) 1.33322E2 (=101325/760) (1.00000 mmHg) (inH20) to Pa: 2.49089E2 (inHg) to Pa: 3.38639E3 (lbf/in2) to Pa: 6.8947