Illustrations of the Centimetre-gramme-second (C.G.S.) System of Units: Based on the Recommendations of the Committee Appointed by the British Association "For the Selection and Nomenclature of Dynamical and Electrical Units".Taylor & Francis, 1875 - 103 pagina's |
Overige edities - Alles bekijken
Illustrations of the Centimetre-gramme-second (C.G.S.) System of Units ... Joseph David Everett Volledige weergave - 1875 |
Illustrations of the Centimetre-gramme-second (C.G.S.) System of Units Joseph David Everett Gedeeltelijke weergave - 2024 |
Illustrations of the Centimetre-gramme-second (C.G.S.) System of Units Joseph David Everett Gedeeltelijke weergave - 2024 |
Veelvoorkomende woorden en zinsdelen
atmosphere Brass C.G.S. system C.G.S. units capacity of unit centrifugal force coefficient of elasticity compression conductivity cubic centim cubic centimetre Daniell's cell defined denote dimensions dry air dynes per square electromagnetic units electromotive force electrostatic unit employed equal equation ergs farad following are reduced formula German silver given gramme gramme-degree heat required height Hence inch intensity of magnetization Iron kilogramme liquid mass of water mean megadyne per square mercury metre millimetre multiplied numerical value place where g platinum pole pound pressure Professor quantity of electricity quotient radius ratio required to raise resistance Sidereal day Simple Rigidity specific gravity specific heat specimen square centim Steel substance Temp thermal capacity unit acceleration unit mass unit of acceleration unit of area unit of force unit of heat unit of length unit of mass unit of quantity unit volume unity vacuo value of g Volume-elasticity wire Young's modulus Zinc وو
Populaire passages
Pagina 85 - ... meridians is a metre-seven, or a centimetre-nine. For multiplication or division by a million, the prefixes mega* and micro may conveniently be employed, according to the present custom of electricians. Thus the megohm is a million ohms, and the microfarad is the millionth part of a farad. The prefix mega is equivalent to the affix six. The prefix micro is equivalent to the prefix sixth. The prefixes kilo, hecto, deca, deci, centi, milli can also be employed in their usual senses before all new...
Pagina 59 - The work required to move a pole P from one point to another, is the product of P by the difference of the magnetic potentials of the two points. Hence, the dimensions of magnetic potenml
Pagina 39 - The maximum theoretical temperature evidently depends upon the quantity of heat developed by the combustion of a unit weight of the gas and upon the quantity of heat required to raise, by one degree, the temperature of the products resulting from the combustion of this unit weight, and the quotient obtained by dividing the...
Pagina 49 - I0~atfor polished copper, x denoting the quantity of heat lost per second per square centim. of surface of the copper, per degree of difference between its temperature and that of the walls of the enclosure. These latter were blackened internally, and were kept at a nearly constant temperature of 14° C. The air within the enclosure was kept moist by a saucer of water. The greatest difference of temperature employed in the experiments (in other words, the highest value of t) was 50° or 60° C.
Pagina 67 - Now yp is clearly the value in centims. per second of that velocity which would be denoted by unity in the new system. This is a definite concrete velocity ; and its numerical value will always be equal to the ratio of the electromagnetic to the electrostatic unit of quantity, whatever units of length, mass, and time are employed.
Pagina 86 - CGS unit of power is the power of doing work at the rate of one erg per second ; and the power of an engine, under given conditions of working, can be specified in ergs per second. For rough comparison with the vulgar (and variable) units based on terrestrial gravitation, the following statement will be useful : The weight of a gramme, at any part of the earth's surface, is about 980 dynes, or rather less than a kilodyne. The weight of a kilogramme is rather less than a megadyne, being about 980,000...
Pagina 84 - ... selected. The carrying out of this resolution involves the adoption of some units which are excessively large or excessively small in comparison with the magnitudes which occur in practice ; but a remedy for this inconvenience is provided by a method of denoting decimal multiples and sub-multiples, which has already been extensively adopted, and which we desire to recommend for general use. On the initial question of the particular units of mass, length, and time, to be recommended as the basis...
Pagina 59 - Hence intensity of magnetization has the same dimensions as intensity of field. When a magnetic substance (whether paramagnetic or diamagnetic) is placed in a magnetic field, it is magnetized by induction ; and each substance has its own specific coefficient of magnetic induction...
Pagina 86 - The forms ergon, ergal, and erg have been suggested ; but the second of these has been used in a different sense by Clausius. In this case also we propose, for the present, to leave the termination unsettled ; and we request that the word ergon, or erg, be strictly limited to the CGS unit of work, or what is, for purposes of measurement, equivalent to this, the CGS unit of energy, energy being measured by the amount of work which it represents. The CGS unit of power is the power of doing work at...
Pagina 58 - The intensity of a magnetic field is the force which a unit pole will experience when placed in it. Denoting this intensity by I, the force on a pole P will be IP. Hence IP = force = MLT--, I = that is, the dimensions of field-intensity axe 156.