Laboratory manual in physics . Velocity of Sound ,... 74 Effect of Tension and Length on Number of Vibrations 76 LIGHT Use of Pupil of the Eye 78 Convex and Concave Lenses 79 The Telescope 81 Candlepower 82 Efficiencies of Carbon Filament and Tungsten Lamps 84 APPENDIX I. Tension and Breaking-Strength 86 Elasticity 87 Pendulum Vibrations 89 Accelerated Motion 90 The Wheatstone Bridge 93 Voltage 95 Images 97 Refraction 98 APPENDIX II. (Tables) Densities of Solids, Liquids, and Gases 101 Specific Heats . 101 Diameter of Wires 102 Useful Data 103 LABORATORY MANUAL IN PHYSICS EXPERIMENT No. 1PART
Laboratory manual in physics . Velocity of Sound ,... 74 Effect of Tension and Length on Number of Vibrations 76 LIGHT Use of Pupil of the Eye 78 Convex and Concave Lenses 79 The Telescope 81 Candlepower 82 Efficiencies of Carbon Filament and Tungsten Lamps 84 APPENDIX I. Tension and Breaking-Strength 86 Elasticity 87 Pendulum Vibrations 89 Accelerated Motion 90 The Wheatstone Bridge 93 Voltage 95 Images 97 Refraction 98 APPENDIX II. (Tables) Densities of Solids, Liquids, and Gases 101 Specific Heats . 101 Diameter of Wires 102 Useful Data 103 LABORATORY MANUAL IN PHYSICS EXPERIMENT No. 1PART I Question.—Does it require more work to slide a cakeof ice up an inclined plane than to lift it vertically tothe top of the plane? Apparatus.— Inclined plane; block of iron weighingseveral pounds; spring balance. Remarks.—Work is expressed in foot-pounds and isdetermined by multiplying together the number ofpounds of force and the number of feet of distancethrough which the force acts. One foot-pound =1 pound X 1 Directions.— Find the weight of the block and theheight CB of the plane. The product of these twowill give the work done in lifting the block find the length AB of the plane and the forcerequired to draw the block with uniform speed up theplane as indicated by the spring balance. The prod- 8 Laboratory Manual in Physics uct of these two will give the work done in drawingthe block up the plane. Call the weight of the blockthe resistance and the force exerted along the planethe effort, and record your results as follows:Results.— Resistance = lb. Effort = lb. Resistance X height of plane = foot-pounds. Effort X length of plane = foot-pounds. Discussion.—The work done on this machine, thatis, effort X length, is known as the input. The workperformed by the machine, that is, resistance Xheight, is known as the output. Which is greater, theinput, or the output? What causes this difference? PART II Question.—What is the efficiency of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysics, bookyear1912
