Notes on Physics

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1909 - 808 pages

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Page 74 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Page 95 - Newton discovered, as a fundamental law of nature, that every particle attracts every other particle with a force which varies directly as the product of the masses and inversely as the square of the distance between them.
Page 36 - Equation 3, we see that an angle of 1 rad is the angle subtended at the center of a circle by an arc equal in length to the radius of the circle (see Figure 2).
Page 655 - An exterior angle of a triangle is equal to the sum of the two opposite interior angles.
Page 95 - Every particle of matter in the universe attracts every other particle of matter with a force directly proportional to the product of the masses and inversely proportional to the square of the distance between them.
Page 114 - This latter calculation is laborious, the weight of each part of the structure and lading having to be multiplied by the square of its distance from the axis ; but with care it can be performed with a close approach to accuracy.
Page 74 - III. To every action there is always an equal' and contrary reaction; or the mutual actions of two bodies are always equal and in opposite directions. By "change of motion" we are to understand change of momentum, and by " impressed force ,
Page 139 - density of a substance to the density of some reference substance.
Page 403 - Ike current is directly proportional to the electromotive force and inversely proportional to the resistance.
Page 139 - The specific gravity of a solid or liquid is the ratio of the mass of the body to the mass of an equal volume of water at some standard temperature.

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