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Economics ( / ˌɛkəˈnɒmɪks, ˌiːkə -/) [1] [2] is a social science that studies the production, distribution, and consumption of goods and services. [3] [4] Economics focuses on the behaviour and interactions of economic agents and how economies work.
An operational definition specifies concrete, replicable procedures designed to represent a construct. In the words of American psychologist S.S. Stevens (1935), "An operation is the performance which we execute in order to make known a concept." [1] [2] For example, an operational definition of "fear" (the construct) often includes measurable ...
Ethics, also referred to as moral philosophy, is the study of moral phenomena. It is one of the main branches of philosophy and investigates the nature of morality and the principles that govern the moral evaluation of conduct, character traits, and institutions. It examines what obligations people have, what behavior is right and wrong, and ...
Magna Carta Libertatum ( Medieval Latin for "Great Charter of Freedoms"), commonly called Magna Carta or sometimes Magna Charta ("Great Charter"), [a] is a royal charter [4] [5] of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. [b] First drafted by the Archbishop of Canterbury, Cardinal Stephen Langton, to ...
Binocular vision. Principle of binocular vision with horopter shown. In biology, binocular vision is a type of vision in which an animal has two eyes capable of facing the same direction to perceive a single three-dimensional image of its surroundings. Binocular vision does not typically refer to vision where an animal has eyes on opposite ...
Education is a wide phenomenon that applies to all age groups and covers formal education (top row) as well as non-formal and informal education (bottom row). Education is the transmission of knowledge, skills, and character traits and manifests in various forms. Formal education occurs within a structured institutional framework, such as ...
Exponential functions with bases 2 and 1/2. The exponential function is a mathematical function denoted by () = or (where the argument x is written as an exponent).Unless otherwise specified, the term generally refers to the positive-valued function of a real variable, although it can be extended to the complex numbers or generalized to other mathematical objects like matrices or Lie algebras.
Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale. The most widely used renewable energy types are solar energy, wind power and hydropower. Bioenergy and geothermal power are also significant in some countries. Some also consider nuclear power a renewable power source ...