Elements of PhysicsGinn, 1927 - 509 pages |
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Page ix
... ENERGY · · • Definition and Measurement of Work Work and the Pulley Work and the Lever The Principle of Work Power and Energy · Fric- tion Efficiency VIII . THERMOMETRY ; EXPANSION COEFFICIENTS • Thermometry Expansion Coefficient of ...
... ENERGY · · • Definition and Measurement of Work Work and the Pulley Work and the Lever The Principle of Work Power and Energy · Fric- tion Efficiency VIII . THERMOMETRY ; EXPANSION COEFFICIENTS • Thermometry Expansion Coefficient of ...
Page 114
... ENERGY * DEFINITION AND MEASUREMENT OF WORK 125. Definition of work . Whenever a force moves a body on which it acts , it is said to do work upon that body , and the amount of the work accomplished is measured by the prod- uct of the ...
... ENERGY * DEFINITION AND MEASUREMENT OF WORK 125. Definition of work . Whenever a force moves a body on which it acts , it is said to do work upon that body , and the amount of the work accomplished is measured by the prod- uct of the ...
Page 116
... , R , oppos- ing the motion . Again , since the length of the string is al- ways constant , the distance s through which FIG . 112. The sin- gle fixed pulley the point A , at which E is applied , 116 WORK AND MECHANICAL ENERGY.
... , R , oppos- ing the motion . Again , since the length of the string is al- ways constant , the distance s through which FIG . 112. The sin- gle fixed pulley the point A , at which E is applied , 116 WORK AND MECHANICAL ENERGY.
Page 118
... sometimes possible to overcome a much larger resisting force R. The ratio of the resistance R to the effort E ( ignoring friction ) is called the mechanical advantage of the machine . Thus , the mechanical 118 WORK AND MECHANICAL ENERGY.
... sometimes possible to overcome a much larger resisting force R. The ratio of the resistance R to the effort E ( ignoring friction ) is called the mechanical advantage of the machine . Thus , the mechanical 118 WORK AND MECHANICAL ENERGY.
Page 120
... its distance I from the fulcrum ( Fig . 116 ) will be found to be equal to the product of the resistance R by its distance l ' from the fulcrum . AN ELECTRIC SHOVEL A giant electric shovel , the most 120 WORK AND MECHANICAL ENERGY.
... its distance I from the fulcrum ( Fig . 116 ) will be found to be equal to the product of the resistance R by its distance l ' from the fulcrum . AN ELECTRIC SHOVEL A giant electric shovel , the most 120 WORK AND MECHANICAL ENERGY.
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Common terms and phrases
ammeter amperes armature ball body Boyle's law calories charge circuit coil condenser conductor connected copper cubic centimeter cylinder density direction distance dynamo earth electric electrical charge electroscope engine equal experiment fall feet flow force acting freezing friction galvanic cell galvanometer gases glass gram heat Hence hydrogen inch induced iron kinetic energy lamp lens Lenz's law lever Leyden jar lift light lines of force liquid machine magnetic field mass measured mechanical advantage mercury metal meter molecules motion motor move needle nonconductor Ohm's law ohms opposite pass pipe piston placed plane plate pole position pounds pressure produced pull pulley QUESTIONS AND PROBLEMS rays resistance rotation shown in Fig shows solid specific gravity speed steam substances surface temperature thermometer tion tube vacuum vapor velocity vessel vibration volts volume wave length weight wheel wire zinc
Popular passages
Page 92 - 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 498 - And show me how they calculated the initiatory speed of our car?" "Yes, my worthy friend; taking into consideration all the elements of the problem, the distance from the center of the earth to the center of the moon...
Page 64 - ... is, the resultant of two parallel forces acting in the same direction is equal to the sum of the two forces.
Page 114 - ... work accomplished is measured by the product of the force acting and the distance through which it moves the body.
Page 2 - ... the inch, the hand, the foot, the fathom, the rod, the mile, etc., have been derived either from the lengths of different members of the human body or from equally unrelated magnitudes, and in consequence have been connected with one another by different, and often by very awkward, multipliers. Thus, there are 12 inches in a foot, 3 feet in a yard, 5^ yards in a rod, 1760 yards in a mile, etc. 4. Relations between units of length, area, volume, and mass. A similar and even worse complexity exists...
Page 163 - The calorie is the amount of heat that is required to raise the temperature of 1 gram of water through 1° C...
Page 25 - Therefore the specific gravity of a solid or a liquid body, is the ratio of its weight to the weight of an equal volume of water...
Page 284 - The resistance of any conductor is directly proportional to its length and inversely proportional to the area of its cross section or to the square of its diameter.
Page 128 - FIG. 228. slides up. When the force acting on the end of the lever has made one revolution, the weight which rests upon the top of the screw has evidently been lifted through a vertical distance equal to the distance between the threads. Has the hand which furnishes the power moved much farther than the weight has been lifted? For what purposes are jackscrews used ? The most common example of a screw is the bolt and nut. Why is a wrench used in turning a nut on a bolt ? The screw press and the vise...
Page 107 - If the cohesive force oF(Fig. 117) is strong in comparison with the adhesive force oE, the resultant oR will fall to the right of the vertical, in which case the liquid must be depressed about o. Whether, then, a liquid will rise against a solid wall or be depressed by it, will depend only on the relative strengths of the adhesion of the wall for the liquid and the cohesion of the liquid for itself.