Illustrations of the C.G.S. System of Units: With Tables of Physical Constants |
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Page 145
... magnetised substance , their moments will be simply as their volumes . Hence the intensity of magnetisation of a uniformly magnetised body is defined as the quotient of its moment by its volume . But we have moment MLT - 1 . L - 3 = ML ...
... magnetised substance , their moments will be simply as their volumes . Hence the intensity of magnetisation of a uniformly magnetised body is defined as the quotient of its moment by its volume . But we have moment MLT - 1 . L - 3 = ML ...
Page 146
... magnetisation ; and when we speak of the magnetising force at a point in a body we mean the field which would exist in such a crevasse excavated about the point . Magnetising force is now usually denoted by H. It is called ...
... magnetisation ; and when we speak of the magnetising force at a point in a body we mean the field which would exist in such a crevasse excavated about the point . Magnetising force is now usually denoted by H. It is called ...
Page 147
... magnetised body ( whether the mag- netisation be temporary or permanent ) has the same value just outside as just inside the body ; whence it can be deduced that if tubes be drawn following the direction of B , the value of the product ...
... magnetised body ( whether the mag- netisation be temporary or permanent ) has the same value just outside as just inside the body ; whence it can be deduced that if tubes be drawn following the direction of B , the value of the product ...
Page 149
... magnetising forces of less than 2000 C.G.S. for wrought iron and nickel , and less than 4000 for cast iron and cobalt ; the ... Magnetisation . 215000 7 : 3 1220 430000 4.3 1040 860000 3 : 4 S40 1290000 3:05 690 190. Vibration or jarring ...
... magnetising forces of less than 2000 C.G.S. for wrought iron and nickel , and less than 4000 for cast iron and cobalt ; the ... Magnetisation . 215000 7 : 3 1220 430000 4.3 1040 860000 3 : 4 S40 1290000 3:05 690 190. Vibration or jarring ...
Page 150
... magnetising forces increases with rise of temperature , slowly at first , and afterwards more rapidly , until the iron is red hot , when it suddenly falls to 1 , and the iron becomes non- magnetic . In an experiment by Hopkinson with a ...
... magnetising forces increases with rise of temperature , slowly at first , and afterwards more rapidly , until the iron is red hot , when it suddenly falls to 1 , and the iron becomes non- magnetic . In an experiment by Hopkinson with a ...
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Common terms and phrases
acceleration adopted atmosphere body C.G.S. system C.G.S. units capacity Carbonic Acid cell centimetre coefficient column compression Copper Crown 8vo cubic centim denoting density determinations difference of potential dimensions distance dynes dynes per square earth's edition elasticity electromotive force electrostatic unit employed equal equation equivalent ergs farad Fcap following table following values formula fundamental units gases given glass grammes gravity Hence Hydrogen inch index of refraction inductive intensity iron liquid longitudinal magnetic mercury metre millimetres multiplied Nitrous Oxide numerical value Oxide Peltier effect PHYSICS Platinum pressure Professor quantity of electricity quotient radius ratio Regnault shear Silver specific heat specific resistance specimen square centim standard stress substance sulphate sulphuric acid surface Temp temperature thermoelectric thermoelectric heights thermometer Thomson effect Trans unit of heat unit of length vacuo value of g velocity Viscosity volume wire Young's modulus Zinc
Popular passages
Page 4 - A ratio of t ; and the numerical value — will vary inversely a as l, and directly in the duplicate ratio of t. In other words, the unit of acceleration varies directly as the unit of length, and inversely as the square of the unit of time; and the numerical value of a given acceleration varies inversely as the unit of length, and directly as the square of the unit of time. It will be observed that these have been deduced as direct consequences from the fact that [the numerical value of] an acceleration...
Page 213 - CGS" prefixed, these being the initial letters of the names of the three fundamental units. Special names, if short and suitable, would, in the opinion of a majority of us, be better than the provisional designations "CGS unit of . . . ." Several lists of names have already been suggested ; and attentive consideration will be given to any further suggestions which we may receive from persons interested in electrical nomenclature. The
Page 216 - September 22nd, 1881:— 1. For electrical measurements, the fundamental units, the centimetre (for length), the gramme (for mass), and the second (for time), are adopted. 2. The Ohm and the Volt (for practical measures of resistance and of electromotive force or potential) are to keep their existing definitions, 102 for the Ohm, and 108 for the Volt.
Page 50 - ... large deformations without receiving a permanent set, is said to have wide limits of elasticity. A body which, like steel, opposes great resistance to deformation, is said to have large coefficients of elasticity. Any change in the shape or size of a body produced by the application of force to the body is called a strain; and an action of force tending to produce a strain is called a stress. When a wire of cross-section A is stretched with a force F, the...
Page 211 - FRS, and Professor EVERETT (Reporter). WE consider that the most urgent portion of the task intrusted to us is that which concerns the selection and nomenclature of units of force and energy ; and under this head we are prepared to offer a definite recommendation. A more extensive and difficult part of our duty is the selection and nomenclature of electrical and magnetic units. Under this head we are prepared with a definite recommendation as regards selection, but with only an interim recommendation...