A page of the Numeropedia - the Special Encyclopedia of Numbers
-459.67 & -273.15
[Science] The “absolute zero” degree, the coldest possible temperature, at which all random molecular motions cease: –273.15 oC (Celsius or centigrade) = 0 K (Kelvin) = -459.67 oF (Fahrenheit). Kelvin (a unit of thermodynamic temperature, named after Lord Kelvin, the Scottish mathematician and physicist William Thomson) is the fraction (1/273.16) of the thermodynamic temperature of the triple point of water, where water forms an interface of 3 phases: solid, liquid and vapor.
[Science] The temperature at which the degrees in Celsius (or centigrade) and in Fahrenheit are exactly the same: -40 oC = -40 oF.
[Science] Prefix: Yocto- = 10-24 = 1/1,000,000,000,000,000,000,000,000.
[Science] Prefix: Zepto- = 10-21 = /1,000,000,000,000,000,000,000.
[Science] Prefix: Atto- = 10-18 = /1,000,000,000,000,000,000.
[Science] The lowest temperature that the German scientist Gabriel Daniel Fahrenheit could obtain by mixing salt and ice: -17.78 oC = 0 oF.
[Science] Prefix: Femto- = 10-15 = 1/1,000,000,000,000,000. A femtometer is called a Fermi (in honor of the Italian/U.S. physicist Enrico Fermi).
[Science] Prefix: Pico- = 10-12 = 1/1,000,000,000,000.
[Science] 1 Ångström = 10-10 m = 1/10,000,000,000 m (meter).
[Science] Prefix: Nano- = 10-9 = 1/1,000,000,000.
[Science] Prefix: Micro- = 10-6 = 1/1,000,000.
[Sport] The maximal score made for a hole in golf, only in the extremely rare situation: hole-in-one of a par-5 hole, called a condor or triple-eagle.
[Science] Prefix: Milli- = 10-3 = 1/1,000.
[Sport] The score of a double-eagle (albatross) made for a hole in a game of golf.
[EECS] The exponent of 10 represented by the silver color of the 3rd band (i.e. multiplier is 10-2) in the electronic resistor/capacitor color code.
[Science] Prefix: Centi- = 10-2 = 1/100.
[Sport] The score of an eagle made for a hole in a game of golf.
[EECS] The exponent of 10 represented by the gold color of the 3rd band (i.e. multiplier is 10-1) in the electronic resistor/capacitor color code.
[Math.] Inverse (or reciprocal) of a number a is a-1 = 1/a.
Inverse of a function f(x) is f -1, such that: f -1(f(x)) = f(f -1(x)) = x.
[Math.] Square of i: -1 = i2 or i = (-1)1/2, where the symbol i is the imaginary unit, introduced by the Swiss mathematician Leonhard Euler in 1777.
The formula eip = -1 is one of the most amazing mathematical formulae, discovered by the Swiss mathematician Leonhard Euler, involves 3 special numbers: the transcendental Euler's number (e = 2.718281828…, the base of the natural logarithm, also known as Napier's constant), the transcendental number pi (p = 3.141592654…, the ratio of a circle’s circumference to its diameter) and an imaginary number i = (-1)1/2 together with a negative integer (-1 = i2).
[Science] Prefix: Deci- = 10-1 = 1/10.
[Sport] The score of a birdie made for a hole in a game of golf.
[Math.] The value of some basic mathematical functions:
sin(210o) = sin(330o) and cos(120o) = cos(240o)
[Math.] Euler numbers (or secant numbers Ei) are defined by the infinite series: sec(x) = 1/cos(x) = 1+E2(x2/2!)+E4(x4/4!)+E6(x6/6!)+…, where E0 = 1, E2 = -1, E4 = 5, E6 = -61, E8 = 1,385, E10 = -50,521, E12 = 2,702,765, E14 = -199,360,981, E16 = 19,391,512,145, E18 = -2,404,879,675,441… The odd-indexed Euler numbers are all 0. The even-indexed Euler numbers have alternating signs.
[Movie] Name of TV show/series or movie: “Less Than Zero”.