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without 15
wood 4
word 1
work 126
worked 1
working 9
workman 1
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203 it
156 by
134 as
126 work
125 that
125 we
101 be
Hermann Ludwig Ferdinand von Helmholtz
On the Conservation of Force

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work

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1 Int | art came together in his work on esthetics, and he had 2 I | understand the forces at work in the world in which he 3 I | regards the kind of scientific work. I then endeavoured to show 4 I | what we call amount of work in the mechanical sense 5 I | of the word.~The idea of work for machines, or natural 6 I | concerned. In speaking of the work of machines and of natural 7 I | of the hard and intense work of thinking, which tries 8 I | intelligence is met with in the work of machines, of course is 9 I | assigned to the instrument at work.~Now, the external work 10 I | work.~Now, the external work of man is of the most varied 11 I | used on it, and the kind of work produced. But both the arm 12 I | is incapable of doing any work; the moving force of the 13 I | of the muscle must be at work in it, and these must obey 14 I | and weaving frames, the work of which rivals that of 15 I | of the muscles.~Now, the work of the smith requires a 16 I | we speak of the amount of work of a machine. We have nothing 17 I | of becoming exhausted by work is also met with in the 18 I | when their capacity for work is spent, there is a possibility 19 I | understand by amount of work; but we must endeavour, 20 I | to measure the amount of work. This we can do better by 21 I | activity can be restored.~The work which the weight has to 22 I | must be continually at work. Such a one is the weight.~ 23 I | measure for the amount of work. Let us assume that a clock 24 I | others, ten times as much work is performed for ten pounds 25 I | fall being the same, the work increases directly as the 26 I | therefore do twice as much work as when it can only run 27 I | weight being the same, the work increases as the height 28 I | off all as a measure of work, at any rate, in the present 29 I | for measuring magnitude or work is a foot pound - that is, 30 I | that is, the amount of work which a pound raised through 31 I | may apply this measure of work to all kinds of machines, 32 I | had performed a certain work, Hence it is that the measurement 33 I | that the measurement of work by foot pounds is universally 34 I | that case be simpler to work the machine by the direct 35 I | levels, it may be used to work other wheels. But when it 36 I | one man must necessarily work four times as long as the 37 I | the total expenditure of work is the same, whether four 38 I | whether four labourers work for a quarter of an hour 39 I | labour, we introduce the work of a weight, and hang to 40 I | also, you will observe no work has been gained, for while 41 I | through one inch is, as work, equivalent to the product 42 I | but that the amount of work is never thereby increased.~ 43 I(1) | the technical measure of work; to convert it into scientific 44 II | motive force, and can produce work, is called vis viva. The 45 II | velocity has been lost by the work which they have performed.~ 46 II | mechanics, of performing work. This would also be the 47 II | mass. It is equal to the work, expressed in foot-pounds, 48 II | weight goes from a to m the work of the raised weight is 49 II | viva is changed into the work of a raised weight. Thus 50 II | raised weight. Thus the work which the arm originally 51 II | spring can, however, perform work; it gradually expends this 52 II | stretch the cord my arm must work for a few seconds; this 53 II | for a few seconds; this work is imparted to the arrow 54 II | extremely short time the entire work which the arm had communicated 55 II | several days. In both cases no work is produced which my arm 56 II | already seen is a form of work.~In this case, then, I have 57 II | case, then, I have gained work which my arm has not performed. 58 II | under the influence of which work has been gained.~Elastic 59 II | cases liquid is raised, and work thereby produced.~The same 60 II | the machine, and furnish work.~You all know how powerful 61 II | the further capacity for work of the natural forces is 62 II | diminished or exhausted by the work which has been performed. 63 II | namely, that to mechanical work - had not been accurately 64 II | endeavoured to deduce the work which heat performs, by 65 II | the capacity of heat for work, which even now, though 66 II | equivalent of a mechanical work; so long as this velocity 67 II | apparently also the mechanical work which this velocity could 68 II | processes in which mechanical work is destroyed, and heat produced 69 II(2)| technical measure of the work we must divide it by the 70 III | foot pounds the amount of work which is destroyed by the 71 III | produced by the consumption of work, a definite quantity of 72 III | a definite quantity of work is required to produce that 73 III | centigrade. The quantity of work necessary for this is, according 74 III | experiments, equal to the work which a gramme would perform 75 III | relations between heat and work were also found in the reverse 76 III | process - that is, when work was produced by heat. In 77 III | producing large quantities of work, as in the case of the steam 78 III | does it. Gas thus performs work, and this work is produced 79 III | performs work, and this work is produced at the cost 80 III | compressed, and how much work is necessary for their compression; 81 III | equivalence of heat and mechanical work in friction, as close an 82 III | into a definite quantity of work; this quantity of work can 83 III | of work; this quantity of work can also be retransformed 84 III | form in which a quantity of work may appear.~These facts 85 III | transformed into other forms of work, or results afresh from 86 III | forces which can produce work - I mean the chemical. We 87 III | the ultimate cause of the work which gunpowder and the 88 III | carbon and of oxygen performs work just as much as that which 89 III | just as the same amount of work is produced when a weight 90 III | longer produce either heat or work any more than a fallen weight 91 III | than a fallen weight can do work if it has not been again 92 III | once more the capacity of work which they had before they 93 III | carbon for oxygen, performs work in combustion, which appears 94 III | before, but its capacity for work is lost. Hence the two elements 95 III | for it its capacity for work.~We here become acquainted 96 III | acquainted with a new source of work, the electric current which 97 III | affinity which is capable of work, it is here lost. The electrical 98 III | this case, we can restore work which has been lost, but 99 III | turns the wheel produces the work which is required for separating 100 III | raised weight can produce work, but in doing so it must 101 III | but it can no longer do work.~A stretched spring can 102 III | stretched spring can do work, but in so doing it becomes 103 III | of a moving mass can do work, but in doing so it comes 104 III | to rest. Heat can perform work; it is destroyed in the 105 III | Chemical forces can perform work, but they exhaust themselves 106 III | Electrical currents can perform work, but to keep them up we 107 III | that their capacity for work is exhausted in the degree 108 III | which they actually perform work.~We have seen, further, 109 III | fell without performing any work, it either acquired velocity 110 III | electrical currents or mechanical work.~We have seen that heat 111 III | heat may be changed into work; there are apparatus (thermo-electric 112 III | whenever the capacity for work of one natural force is 113 III | force which is capable of work. The connections between 114 III | accustomed to measure mechanical work, and how the equivalent 115 III | and how the equivalent in work of heat may be found. The 116 III | found. The equivalent in work of chemical processes is 117 III | relations, the equivalent in work of the other natural forces 118 III | expressed in terms of mechanical work.~If, now, a certain quantity 119 III | certain quantity of mechanical work is lost, there is obtained, 120 III | an equivalent of heat or work; so that in all these interchanges 121 III | all the forces capable of work in the whole universe remains 122 III | practical interests of technical work, we have been led up to 123 III | understood a machine which was to work continuously without the 124 III | the expenditure of fuel. Work is wealth. A machine which 125 III | machine which could produce work from nothing was as good 126 IV | the great operations at work in the life of the earth


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