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AD: The abbreviation for aggregate demand, which is the total (or aggregate) real expenditures on final goods and services produced in the domestic economy that buyers would willing and able to make at different price levels, during a given time period (usually a year). Aggregate demand (AD) is one half of the aggregate market analysis; the other half is aggregate supply. Aggregate demand, relates the economy's price level, measured by the GDP price deflator, and aggregate expenditures on domestic production, measured by real gross domestic product. The aggregate expenditures are consumption, investment, government purchases, and net exports made by the four macroeconomic sectors (household, business, government, and foreign).
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![](../images/a1.gif) ![](../images/b1.gif) ![](../images/c1.gif) ![](../images/d1.gif) ![](../images/e1.gif) ![](../images/f1.gif) ![](../images/g1.gif) ![](../images/h1.gif) ![](../images/i1.gif) ![](../images/j1.gif) ![](../images/k1.gif) ![](../images/l1.gif) ![](../images/m1.gif) ![](../images/n1.gif) ![](../images/o1.gif) ![](../images/p1.gif) ![](../images/q1.gif) ![](../images/r1.gif) ![](../images/s1.gif) ![](../images/t1.gif) ![](../images/u1.gif) ![](../images/v1.gif) ![](../images/w1.gif) ![](../images/x1.gif) ![](../images/y1.gif) ![](../images/z1.gif) ![](../images/nbr1.gif) PHYSICAL SCIENCE: The scientific study of the physical world, especially nonhuman, nonsociety phenomena, such as atoms, planets, wildlife, and continental drift. Common disciplines that study these physical phenomena are physics, chemistry, biology, geology, and astronomy. Physical science is one of two broad scientific classifications. The other is social science, which is the study human behavior and society. Physical science contains the areas of study most commonly associated with the term science, especially astronomy, physics, chemistry, and biology. These are the areas that were first to use the scientific method to explain and understand the workings of the world. Chemists, physicists, biologists, and astronomers developed experiments, data collection techniques, and hypothesis testing procedures designed to develop theoretical explanations of the world.Because these physical sciences were the first to use the scientific method some scientific purists tend to look down on social sciences, including economics, as not meriting the title of "science." The distinction between social and physical sciences, however, is somewhat arbitrary. For example, while psychologists study human behavior and chemists study chemical reactions, a growing body of evidence suggests that human behavior depends on chemical reactions in the brain. As such, are chemists who study the chemistry of the brain doing physical science or social science? Or are psychologists who study behavior related to the chemistry of the brain doing social science or physical science? The conclusion is both and neither. The conclusion is that the real world is somewhat arbitrarily segmented into different areas, including physical science and social science as well as chemistry and psychology. This segmentation enables specialization of scientific effort as scientists become experts in narrowly defined topics. The real world, however, is a continuum of complex, interrelated phenomena. So long as this interrelated continuum is recognized, specialization produces all sorts of efficiency benefits.
![](../images/aw_sm.gif) Recommended Citation:PHYSICAL SCIENCE, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2024. [Accessed: July 26, 2024]. Check Out These Related Terms... | | | Or For A Little Background... | | | | | | | | | | | | And For Further Study... | | | | | Related Websites (Will Open in New Window)... | |
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GRAY SKITTERY [What's This?]
Today, you are likely to spend a great deal of time flipping through mail order catalogs looking to buy either a genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for high interest rates. Your Complete Scope
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Parker Brothers, the folks who produce the Monopoly board game, prints more Monopoly money each year than real currency printed by the U.S. government.
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"Old age isn't so bad when you consider the alternative. " -- Cato, Roman orator
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AEC Annual Equivalent Costs
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