Natural Philosophy

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J.B. Lippincott, 1892 - Physics - 350 pages
 

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Page 257 - The force of attraction or repulsion between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Page 256 - I went into the cube and lived in it, and using lighted candles, electrometers, and all other tests of electrical states, I could not find the least influence upon them, or indication of anything particular given by them, though all the time the outside of the cube was powerfully charged, and large sparks and brushes were darting off from every part of its outer surface.
Page 211 - The calorie is the amount of heat necessary to raise the temperature of one gram of water one degree centigrade.
Page 125 - Nothing can be more surprising,' writes Sir John Herschel, in reference to this subject, 'than to see two persons, neither of them deaf, the one complaining of the penetrating shrillness of a sound, while the other maintains there is no sound at all.
Page 236 - British thermal unit is the amount of heat required to raise the temperature of 1 pound of water 1 degree F...
Page 286 - Such an electromotive force as would cause a current of one ampere to flow through a resistance of one ohm.
Page 56 - A wheel and axle is used to raise a bucket from a well. The radius of the wheel is 15...
Page 22 - Motion, or change of motion, is proportional to the force impressed, and is produced in the right line in which that force acts.
Page 17 - Every particle of matter, in the universe, attracts every other particle with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Page 245 - Two particles of matter attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of their distance. The notion of 'force' refers to the notion of the addition of a component to the vector acceleration of either particle.

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