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Updated: June 6, 2025
On account, however, of the losses which occur, the effective power, that is the disposable power on the shaft of the motor, will have a smaller value, and in order to arrive at it a coefficient of efficiency, K1, must be added. The author has no knowledge of any experiments having been made for obtaining this efficiency, K1.
There is in modern literature a whole class of writers, tho not a large one, standing within the same category; some marked originality of character in the writer becomes a coefficient with what he says to a common result; you must sympathize with this personality in the author before you can appreciate the most significant parts of his views.
Another point which appears worth mentioning is the following: The foot-screws were of brass, the tribrach, into which they fitted, was made of aluminium for the sake of lightness. The two metals have a different coefficient of expansion, and while the feet fitted the tribrach at ordinary temperatures, they were quite loose at temperatures in the region of 20° Fahr. below zero.
This history is of all time; it suffices to widen slightly the narrow circle in which these personages are about to act to find the coefficient reasons of events which take place in the very highest spheres of social life. Mademoiselle Gamard spent her evenings by rotation in six or eight different houses.
After giving diagrams and tables to illustrate the geometrical disposition of the areas of fusion, Tresca feels justified in concluding that the development of heat depends upon the form of the faces and the intensity of the shock; that the points of greatest heat correspond to the points of greatest flow of the metal, and that this flow is really the mechanical phenomenon which gives rise to the calorific phenomenon; that for action sufficiently energetic and for bars of sufficient dimensions, about 0.8 of the labor expended on the blow may be found again in the heat; that the figures formed in the melted wax for shocks of less intensity furnish a kind of diagram of the distribution of the heat and of the deformation in the interior of the bar, but that the calculation of the coefficient of efficiency does not yield satisfactory results in the case of moderate blows.
Knowing the cross section in millimeters, Q, of the bar, and observing the temperature, t, in degrees Centigrade, its conductivity, x, as compared with mercury can be determined. If L be the distance, h l or k i, in meters, then For pure metals the value of a may be taken at 0.004; but alloys have a different coefficient.
Could it be that, instead of living in the present, he had somehow become entangled in the past or in the future? If so and by now he was so accustomed to the unusual that he considered this staggering possibility with equanimity if the time coefficient was at fault, then how to account for the picture of the professor, in that leaf? Had they both been the victims of a ghastly cosmic joke?
The nominal power of the Red Rover, Herne, and City of Canterbury is, in each case, 120 horses, but the actual power of the Red Rover is 294, of the Herne 354, and of the City of Canterbury 306, and in some vessels the excess is still greater; so that with such variations it becomes necessary to adopt a coefficient derived from the introduction of the actual instead of the nominal power.
He rather supposes, in opposition to Fresnel's idea, that the density of the ether remains the same in all media, while its coefficient of elasticity is variable.
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