# Practical Physics

Ginn, 1922 - 472 pages

### Contents

 Galileo 72 Sir Isaac Newton 83 The Cream Separator 84 MOLECULAR FORCES 90 James ClerkMaxwell 13 Heinrich Rudolph Hertz 102 A Gas Mask 102 WORK AND MECHANICAL ENERGY 105 James Prescott Joule 106 James Watt 122 The Rocket and the Virginian Mallet 122 THERMOMETRY EXPANSION COEFFICIENTS 128 Lord Kelvin Sir William Thomson 19 The Clermont and the Leviathan 134 A United States Dreadnaught in the Panama Canal 21 The VickersVimy Airplane 152 CHANGE OF STATE 161 A Tank 190 The Liberty Motor 190
 Electromagnets PAGE 246 The Principle of the Dynamo and Motor Dynamos 305 NATURE AND TRANSMISSION OF SOUND 319 PROPERTIES OF MUSICAL SOUNDS 342 NATURE AND PROPAGATION OF LIGHT 357 IMAGE FORMATION 378 COLOR PHENOMENA 402 APPENDIX 417 23 32 33 44 45 465 103 466 123 467 246 468 247 469 319 470 Copyright

### Popular passages

Page 458 - 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 67 - Any two bodies in the universe attract each other with a force which is directly proportional to the product of the masses and inversely proportional to the square of the distance between them.
Page 393 - The magnifying power of an astronomical telescope is therefore the focal length of the objective divided by the focal length of the eyepiece. It...
Page 22 - Archimedes stated that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
Page 84 - Every body continues in its state of rest or uniform motion in a straight line, except in so far as it is compelled to change that state by a force impressed upon it.
Page 367 - Index of refraction. The ratio of the speed of light in air to its speed in any other medium is called the index of refraction of that medium.
Page 260 - 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 60 - ... is, the resultant of two parallel forces acting in the same direction is equal to the sum of the two forces.
Page 62 - For in § 79 it was shown that if any one force is to have the same effect upon a body as two forces acting simultaneously, it must be represented by the diagonal of a parallelogram the sides of which represent the two forces. Hence, conversely, if two forces are to be equivalent in their...
Page 2 - Thus, there are 12 inches in a foot, 3 feet in a yard, 5^- yards in a rod, 1760 yards in a mile, etc.