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الكتب الكتب 1 - 10 من 23 فيare overcome in performing useful work and lost work respectively. 660. The Efficiency....
" are overcome in performing useful work and lost work respectively. 660. The Efficiency of a machine is a fraction expressing the ratio of the useful work to the whole work performed, which is equal to the energy expended. The limit to the efficiency of... "
A Manual of Applied Mechanics - الصفحة 606
بواسطة William John Macquorn Rankine - 1872 - عدد الصفحات: 648
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A Manual of the Steam Engine and Other Prime Movers

William John Macquorn Rankine - 1866 - عدد الصفحات: 575
...moving with its mean velocity, as found according to the principles of Article 31. been defined to be a fraction expressing the ratio of the useful work...machine is unity, denoting the efficiency of a perfect machine in which no work is lost. The object of improvements in machines is to bring their efficiency...
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A Manual of the Steam Engine and Other Prime Movers

William John Macquorn Rankine - 1870 - عدد الصفحات: 575
...means of the friction of a brake. Brakes will be further described in the sequel. been defined to be a fraction expressing the ratio of the useful work...expended. The limit to the efficiency of a machine is uniti/, denoting the efficiency of a perfect machine in which no work is lost. The object of improvements...
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A Mechanical Text-book: Or, Introduction to the Study of Mechanics and ...

William John Macquorn Rankine, Edward Fisher Bamber - 1873 - عدد الصفحات: 312
...and Prejudicial Resistance are overcome in performing useful work and lost work respectively. 385. The Efficiency of a machine is a fraction expressing...machine is unity, denoting the efficiency of a perfect machine in which no work is lost. The object of improvements in machines is to bring their efficiency...
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A Mechanical Text-book: Or, Introduction to the Study of Mechanics and ...

William John Macquorn Rankine, Edward Fisher Bamber - 1873 - عدد الصفحات: 312
...increased by means of the friction of a brake. Brakes will be further described in the sequel. 418. The Efficiency of a machine is a fraction expressing the ratio of the useful work to the whole work, which is equal to the energy expended. The COUNTER-EFFICIENCY \a machines is to bring their efficiency...
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A Mechanical Text-book: Or, Introduction to the Study of Mechanics and ...

William John Macquorn Rankine, Edward Fisher Bamber - 1873 - عدد الصفحات: 312
...increased by means of the friction of a brake. Brakes will be further described in the sequel. 418. The Efficiency of a machine is a fraction expressing the ratio of the useful work to the whole work, which is equal to the energy expended. The COUNTER-EFFICIENCY is the reciprocal of the efficiency,...
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A Manual of the Steam Engine and Other Prime Movers

William John Macquorn Rankine - 1878 - عدد الصفحات: 583
...means of the friction of a brake. Brakes will be further described in the sequel. been defined to be a fraction expressing the ratio of the useful •work...machine is unity, denoting the efficiency of a perfect machine in which no work is lost. The object of improvements in machines is to bring their efficiency...
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Tracts on mechanics, by M.W. Crofton, E. Kensington

Morgan W. Crofton - 1881
...but they never can be altogether removed. 20. Efficiency of a Machine.—This is defined to be the fraction expressing the ratio of the useful work to the whole work, which is equal to the energy expended. It is sometimes called the Modulus of the machine. This fraction...
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Notes in Mechanical Engineering

Henry Adams - 1883 - عدد الصفحات: 93
...energy exerted, and the effect the useful work performed, in some interval of time of definite length. The efficiency of a machine is a fraction expressing...ratio of the useful work to the whole work performed or energy expended. This ratio is also called the modulus or coefficient of the machine. The counter-efficiency...
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Notes in Mechanical Engineering

Henry Adams - 1883 - عدد الصفحات: 93
...energy exerted, and the effect the useful work performed, in some interval of time of definite length. The efficiency of a machine is a fraction expressing...ratio of the useful work to the whole work performed or energy expended. This ratio is also called the modulus or coefficient of the machine. The counter-efficiency...
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A Mechanical Text-book: Or, Introduction to the Study of Mechanics

William John Macquorn Rankine, Edward Fisher Bamber - 1884 - عدد الصفحات: 312
...increased by means of the friction of a brake. Brakes will be further described in the sequel. 418. The Efficiency of a machine is a fraction expressing the ratio of the useful work to the whole work, which is equal to the energy expended. The COUNTER-EFFICIENCY is the reciprocal of the efficiency,...
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