Hydraulics, Pneumatics, Graphical Statics, Heat, Refrigeration

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International Textbook Company, 1902 - 610 páginas
 

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Página 362 - The pressure per unit of area exerted anywhere upon a mass of liquid is transmitted undiminished in all directions, and acts with the same force upon all surfaces in a direction at right angles to those surfaces.
Página 375 - That is, the upward pressure exceeds the downward pressure by the weight of a volume of water equal to the volume of the body.
Página 529 - Consider, for instance, joint 6, the polygon for which is a gij a. Notice that the corresponding letters AGIJA, on the truss, follow one another around the joint in such a manner that in passing from one to another we move in a direction opposite to that in which the hands of a clock move, and by naming them all we go around an entire circle in the same direction, passing from A to G, from G to /, from / to J, etc. This gives the directions of the corresponding lines in the diagram for the given...
Página 481 - ... specific gravity — as applied to wood, the ratio of the ovendry weight of a sample to the weight of a volume of water equal to the volume of the sample at some specific moisture content, as green, air-dry, or ovendry.
Página 444 - Law. — The temperature remaining the same, the volume of a given quantity of gas varies inversely as the pressure.
Página 588 - ... one pound of water one degree Fahrenheit is called a British thermal unit.
Página 509 - The moment of a force about a point is the product of the magnitude of the force by the perpendicular distance from the point to the line of action of the force.
Página 509 - The lever arm of a moment is the perpendicular distance from the center of rotation to the line of action of the force.
Página 489 - The wind arrows show the wind to be moving in a direction opposite to the movement of the hands of a watch (counterclockwise) when it is laid, face up, on the map.
Página 545 - For it has been shown (Art. 1 16O) that the bending moment of a force about any point is the product of the pole distance by the parallel intercept at that point between those two lines of the equilibrium polygon which meet upon the line of action of the force. Remembering this simple principle, it is plain that the positive moment of...

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