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  2. Van de Graaff generator - Wikipedia

    en.wikipedia.org/wiki/Van_de_Graaff_generator

    Van de Graaff generator. A Van de Graaff generator is an electrostatic generator which uses a moving belt to accumulate electric charge on a hollow metal globe on the top of an insulated column, creating very high electric potentials. It produces very high voltage direct current (DC) electricity at low current levels.

  3. Law of increasing costs - Wikipedia

    en.wikipedia.org/wiki/Law_of_increasing_costs

    t. e. In economics, the law of increasing costs is a principle that states that to produce an increasing amount of a good a supplier must give up greater and greater amounts of another good. The best way to look at this is to review an example of an economy that only produces two things - cars and oranges. If all the resources of the economy ...

  4. Cost curve - Wikipedia

    en.wikipedia.org/wiki/Cost_curve

    The total cost curve, if non-linear, can represent increasing and diminishing marginal returns.. The short-run total cost (SRTC) and long-run total cost (LRTC) curves are increasing in the quantity of output produced because producing more output requires more labor usage in both the short and long runs, and because in the long run producing more output involves using more of the physical ...

  5. Wagner's law - Wikipedia

    en.wikipedia.org/wiki/Wagner's_law

    Wagner's law, also known as the law of increasing [a] state activity, [2] is the observation that public expenditure increases as national income rises. [3] It is named after the German economist Adolph Wagner (1835–1917), who first observed the effect in his own country and then for other countries.

  6. Demand curve - Wikipedia

    en.wikipedia.org/wiki/Demand_curve

    A demand curve is a graph depicting the inverse demand function, [ 1] a relationship between the price of a certain commodity (the y -axis) and the quantity of that commodity that is demanded at that price (the x -axis). Demand curves can be used either for the price-quantity relationship for an individual consumer (an individual demand curve ...

  7. Law of demand - Wikipedia

    en.wikipedia.org/wiki/Law_of_demand

    The law of demand, however, only makes a qualitative statement in the sense that it describes the direction of change in the amount of quantity demanded but not the magnitude of change. The law of demand is represented by a graph called the demand curve, with quantity demanded on the x-axis and price on the y-axis. Demand curves are downward ...

  8. Marginal cost - Wikipedia

    en.wikipedia.org/wiki/Marginal_cost

    Marginal cost. In economics, the marginal cost is the change in the total cost that arises when the quantity produced is increased, i.e. the cost of producing additional quantity. [ 1] In some contexts, it refers to an increment of one unit of output, and in others it refers to the rate of change of total cost as output is increased by an ...

  9. Bathtub curve - Wikipedia

    en.wikipedia.org/wiki/Bathtub_curve

    The 'bathtub' refers to the shape of a line that curves up at both ends, similar in shape to a bathtub. The bathtub curve has 3 regions: The first region has a decreasing failure rate due to early failures. The middle region is a constant failure rate due to random failures. The last region is an increasing failure rate due to wear-out failures.