[Barbiery]

Hello!


Somebody can say me what´s ;


speed; 40 ns


I would like to know which kind of speed is´t?


Byby.

[Alatar1]

ns is the standard abbreviation for nanosecond.

A nanosecond is .000 000 001 of a second, or 1 x 10E-9 in exponential notation.

40 nanoseconds is about how long it takes light to travel 10 meters, if my memory and calculations are correct.

Exponent : Prefix
--------------------
18 : Exa-
15 : Peta-
12 : Tera-
9 : Giga-
6 : Mega-
3 : Kilo-
2 : Hecto-
1 : Deka-
-
-1 : Deci-
-2 : Centi-
-3 : Milli-
-6 : Micro-
-9 : Nano-
-12 : Pica-
-15 : Femto-
-18 : Atto-

The prefixes in the top half of the list (except, bizarrely, for the last three of them) are abbreviated as uppercase letters (MHz for megahertz), while the lower half are abbreviated using lowercase letters (mg for milligram). So Ms is a megasecond, while ms is a millisecond.

You can put those in front of any metric unit of measurement and, somewhat controversially, in front of names for units of computer storage, except that there 10E3 is often, but not always, replaced with 2E10. Thus a kilobyte is 1024 (=2E10) bytes rather than 1000 (=10E3) and a megabyte is 2E20 bytes rather than 10E6.

Some numbskulls have invented a modified versions of the names for these base two constructs (e.g. kibibyte instead of kilobyte), but they have never caught on (fortunately).

More on all this at NIST.

[Jerry Edwards]

In other words, one billionth of a second.

Jerry(very fast indeed)