# ⓘ Systems ..

## Physical system

In physics, a physical system is any object or part of an object that can be analysed with the laws of physics. An atom or the water in a lake can both be considered as physical systems. Everything outside the system is called the environment, which in the analysis is ignored except for its effects on the system. All matter and energy in the universe could be treated as one big physical system, but often it is much easier to look at the universe a few particles at a time, and treat these particles as their own quantum systems. There are many different physical systems that physicists like ...

## System

A system is a group of related things that work together as a whole. These things can be real or imaginary. Systems can be man-made things like a car engine or natural things like a star system. Systems can also be concepts made by people to organize ideas. A subsystem is a system that is part of some larger system. For example, in computer networking, a disk subsystem is a part of a computer system.

## Black box

A black box, in science and engineering, is a box whose inside working is not known. It is a device, system or object with input and output. There is no knowledge of its internal workings. The way it works is "opaque" black. Almost anything might be referred to as a black box: a transistor, an algorithm, or the human brain. Ashby expains that the term arose when a decision had to be made about opening an engineering box. The question was whether to return the box for repair, or just scrap it. Could this be decided without opening the box? There can be many reasons why a complex system cann ...

## Centimetre-gram-second system of units

The centimetre-gram-second system is a variant of the metric system. The derived units are on the centimeter as the unit of length, the gram as a unit of mass and the second as a unit of time. The system evolved in the nineteenth century when it was used to define both electrical and mechanical units. The cgs units of energy and force are the dyne and the erg. The erg is defined as the work done when a mass of one gram is moved a distance of one centimetre against a force of one dyne. The dyne is defined as the force needed to accelerate a mass of one gram by one centimetre per second squa ...

## Complex system

A complex system is one where smaller elements make complex things happen. These smaller elements can be simple elements or they can be complex systems within themselves. Any such complex elements can be interrelated in simple or complex ways and may be hard to identify as distinct.

## Complexity

Complexity is a property of something with many parts and a complicated arrangement. It is also the state of being complex. Its opposite is simplicity. In science, complexity is also the name for systems science.

## Foro TV

FOROtv is a cable news television channel owned by Televisa. It is seen on most Mexican cable systems and full-time on two stations in Mexico, including XHTV-TDT in Mexico City, with selected programs airing on Televisa Regional and Televisa local stations.

## 2011 New Zealand general election

The 2011 New Zealand general election on Saturday 26 November 2011. One hundred and twenty-one MPs were elected to the New Zealand House of Representatives, 70 from single-member electorates, and 51 from party lists including one overhang seat. A referendum on the voting system was held at the same time as the election, with voters voting by majority to keep the MMP system.

## Bipartisanship

Bipartisanship, sometimes referred to as nonpartisanship, is a political issue, usually when there is a two-party system, in which opposing political parties find common ground through compromise.

## Mexico City Metro

The Mexico City Metro is a rapid transit system that serves the metropolitan area of Mexico City. It also extends to some cities in Mexico State. It is operated by the operated by the Sistema de Transporte Colectivo. It is the second largest metro system in North America after the New York City Subway. In 2019, the system served 1.655 billion passengers.