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Numbers

What's in a number?

π = 3.14159....

Euler identity   e^(iπ)+1=0

π  mnemonics

May I have a large container of coffee

π = 3.1415926

How I want a drink, alcoholic of course, after the heavy lectures involving quantum mechanics

π = 3.14159265358979

π^3 ≈ 31    (31.0063)

1.49^2.87 ≈ π    (3.1408)

prices of most popular vodka in the USSR in the 1960s and 1970s:

1.49 ruble (bottle: 0.25 liter) and 2.87 ruble (0.50 liter)

e = 2.718281828 ...

α = e^2/(ℏ c)  – fine-structure constant

1/α ≈ 137   (137.04)

10×log₁₀(k) ≈ 228.60   (228.5990)

where the Boltzmann constant  k = 1.3807×10^(-23) J/K

10×log₁₀(2) ≈ 3   (3.010)

μ_Earth  = 3.986 × 10^14 m^3 s^(-2)

μ_Sun  = 1.327 × 10^20 m^3 s^(-2)

1 AU  = 1.496 × 10^11 m

R_Earth  = 6378.14 km