# A Text-book of Physics

D.C. Heath, 1911 - Physics - 649 pages

### Contents

 Specific Gravity 51 STATICS OF GASES 52 Atmospheric Pressure 54 Laws of Gases 55 Applications of the Mechanics of Fluids 61 STATICS OF SOLIDS 68 Concurrent Forces 69 Parallel Forces 78 Moments of Force 80 Effect of Weight on the Equilibrium of Bodies 84 Elasticity Stresses and Strains 92 DYNAMICS I Motion 104 Newtons Laws of Motion 120 PAGE I 130 7 132 22 133 + 3 3 134 36 144 PAGE CHAPTER VII THE MOLECULAR THEORY OF MATTER 194 The Structure of Matter 196 Molecular Properties of Gases 202 Molecular Properties of Liquids 207 Molecular Properties of Solids 214 HEAT I Nature of Heat 218 Temperature 220 Conduction and Convection 225 Radiation 230
 Heating and Ventilation of Buildings 283 Heat and Other Forms of Energy 287 Heat Engines 292 SOUND 305 Origin and Transmission of Sound 306 Properties of Musical Sounds 322 Sympathetic and Forced Vibrations Resonance 342 LIGHT I Nature and Transmission of Light 359 Intensity of Illumination Candle Power 368 Reflection of Light 372 Refraction of Light 389 Lenses 405 The Eye 416 Optical Instruments 425 Dispersion of Light Color 437 MAGNETISM I Properties of Magnets 457 The Magnetic Field 466 The Earths Magnetic Field 472 ELECTROSTATICS 477 ELECTRODYNAMICS 501 RADIATIONS THE ELECTRICAL NATURE of MATTER 609 APPENDIX 638 The Laws of Motion in Special Cases IV Work and Kinetic Energy V Machines VI Energy VII Dynamics of Fluids I 20 135 150 642 159 643 183 644 Copyright

### Popular passages

Page 120 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 394 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Page 143 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Page 219 - It is hardly necessary to add, that anything which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance ; and it appears to me to be extremely difficult, if not quite impossible, to form any distinct idea of anything capable of being excited and communicated in the manner the Heat was excited and communicated in these experiments, except it be MOTION.
Page 356 - The organ of hearing consists of three parts : the external ear, the middle ear or tympanum, and the internal ear or labyrinth. The External Ear consists of an expanded portion or pinna, and the auditory canal or meatus.
Page 132 - It seems almost as if nature had resorted to an extraordinary freak to furnish Galileo at this critical moment in the history of science, with an unusual convenience for his public demonstration. Yonder tower of Pisa had bent over to facilitate experimentation, from its top, on falling bodies. One morning, before the assembled university, he ascended the leaning 1 AD WHITE, op.
Page 249 - The specific heat of a substance is numerically equal to the number of calories required to raise the temperature of one gram of the substance one degree Centigrade.
Page 319 - It varies directly as the square root of the elasticity, and inversely as the square root of the density.
Page 163 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 219 - It is difficult to describe the surprise and astonishment,' says Rumford, ' expressed in the countenances of the bystanders, on seeing so large a quantity of cold water (i8J Ib.) heated, and actually made to boil without any fire.