efficiency
Quick Summary
Efficiency, in physics, is a measure of how effectively a system converts input energy into useful output. The second law of thermodynamics establishes a fundamental limit on this conversion. For heat engines, which convert heat into work, efficiency is defined as the ratio of work output to heat input. Due to factors like friction and unavoidable heat loss, no engine can be 100 percent efficient.123
The maximum theoretical efficiency, known as the Carnot efficiency, depends on the temperatures of the heat source and the environment. For example, a power plant operating with a heat source at 1,200 K and an environment at 300 K has a maximum theoretical efficiency of 75 percent. In reality, actual efficiencies are lower due to imperfections in the system.4
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- economic growthQuality improvements in the inputs
…must be converted to “efficiency” units. Thus if a labour force of 100 workers in the first year all had an eighth-grade education, while 20 years later each member had a 10th-grade education, then measured in efficiency units the labour force had grown. If the length of time spent…
Read More…must be converted to “efficiency” units. Thus if a labour force of 100 workers in the first year all had an eighth-grade education, while 20 years later each member had a 10th-grade education, then measured in efficiency units the labour force had grown. If the length of time spent…
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economic systemEquity…market-based rewards lead to the efficiency of the productive system and thereby maximize the total income available for distribution. This argument is countered at two levels. Marxist critics contend that labourers in a capitalist economy are systematically paid less than the value of their work by virtue of the superior…
Read More…market-based rewards lead to the efficiency of the productive system and thereby maximize the total income available for distribution. This argument is countered at two levels. Marxist critics contend that labourers in a capitalist economy are systematically paid less than the value of their work by virtue of the superior…
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productivityMeasure of efficiencyProductivity is also used to measure efficiency, as an aid in economic planning and forecasting, and as a means of assessing the uses to which resources are being put. As to the first of these, the efficiency of industrial operations, for instance, may be…
Read MoreProductivity is also used to measure efficiency, as an aid in economic planning and forecasting, and as a means of assessing the uses to which resources are being put. As to the first of these, the efficiency of industrial operations, for instance, may be…
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labour economicsOrthodox economic theories…same phenomenon is addressed by efficiency wage theories, which propose that the higher-paid occupants of a job grade are also achieving above-average productivity. Implicit contract theories, noting the considerable duration of most labour contracts, account for it as a necessary cost in the effort to overcome the difficulty of monitoring…
Read More…same phenomenon is addressed by efficiency wage theories, which propose that the higher-paid occupants of a job grade are also achieving above-average productivity. Implicit contract theories, noting the considerable duration of most labour contracts, account for it as a necessary cost in the effort to overcome the difficulty of monitoring…
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