Price

In order to measure the ebb and flow of supply and demand, a measurable value is needed. The oldest and most commonly used is price, or the going rate of exchange between buyers and sellers in a market. Price theory, therefore, charts the movement of measurable quantities over time, and the relationship between price and other measurable variables. In Adam Smith's Wealth of Nations, this was the trade-off between price and convenience.A great deal of economic theory is based around prices and the theory of supply and demand. In economic theory, the most efficient form of communication comes about when changes to an economy occur through price, such as when an increase in supply leads to a lower price, or an increase in demand leads to a higher price.

Exchange rates are determined by the relative supply and demand of different currencies an important issue in international trade.In many practical economic models, some form of "price stickiness" is incorporated to model the fact that prices do not move fluidly in many markets. Economic policy often revolves around arguments about the cause of "economic friction", or price stickiness, and which is, therefore, preventing the supply and demand from reaching equilibrium.

Wildfire

A wildfire, also known as a forest fire, vegetation fire, grass fire, brush fire, bushfire (in Australasia), or hill fire, is an uncontrolled fire often occurring in wild land areas, but which can also consume houses or agricultural resources. Common causes include lightning, human carelessness and arson.

Drought and the prevention of small forest fires are major contributors to extreme forest fires.The word "wildfire" originated as a synonym for Greek fire, a napalm-like substance used in medieval Europe as a naval weapon; the word attained its present meaning by a common misunderstanding of the expression "spread like wildfire".

Wildfires are common in many places around the world, including much of the vegetated areas of Australia, 'veld' in the interior and 'fynbos' in the Western Cape of South Africa, forest areas of the United States and Canada, where the climates are sufficiently moist to allow the growth of trees, but feature extended dry, hot periods when fallen branches, leaves, and other material can dry out and become highly flammable.

Stand-up comedy

A stand-up comedian or stand-up comic is someone that performs comedy in an informal way, talking to the audience with the absence of the theatrical "fourth wall". It is regularly done by one comedian and usually with a microphone. It can be done in comedy clubs, colleges, theaters, option venues--almost anywhere an audience is open to comedy. The comic usually recites a fast paced sequence of amusing stories, short jokes (called bits) and one-liners, usually called a monologue, routine or act. Some stand-up comedians use props, music, or magic tricks in their acts.

Many stand-up routines are similar to one man shows, with the main difference being the expectations of the audience, who, with stand-up; expect a relatively steady stream of "laughs". This in turn affects the aims of the performer, who is under great pressure to deliver those laughs.