Introduction to Physical Science

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Ginn, 1896 - Physics - 374 pages

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Page 76 - THIRD LAW OF MOTION : To every action there is an equal and opposite reaction.
Page 302 - Why the image is seen as far behind the mirror as the object is in front of it.— Let AB be an arrow held Fig.
Page 16 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Page 30 - But it indirectly feels the pressure of the air on the surface of the water in the open vessel, and it is this pressure that sustains the water in the jar. But the...
Page 181 - The current is equal to the electro-motive force divided by the resistance...
Page 180 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Page 108 - For convenience we call the distance of the point of application of the force from the fulcrum the force-arm, and the distance of the resistance from the fulcrum the resistancearm.
Page 145 - The vast influence which the ocean must exert, as a moderator of climate, here suggests itself. The heat of summer is stored up in the ocean, and slowly given out during the winter. This is one cause of the absence of extremes in an island climate.
Page 180 - That the resistance offered to an unvarying electric current by a column of mercury of a constant cross sectional area of one square millimetre, and of a length of 106'3 centimetres at the temperature of melting ice may be adopted as one ohm.
Page 192 - That is, the reciprocal of the joint resistance of any number of branches is equal to the sum of the reciprocals of the resistances of the several branches.

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