Practical PhysicsGinn, 1922 - 472 pages |
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Page 64
... pendulum . When a pendulum is drawn aside from its position of rest ( Fig . 65 ) , the force acting on the bob is its weight , and the direction of this force is vertical . Let it be represented by the line OR . The component of this ...
... pendulum . When a pendulum is drawn aside from its position of rest ( Fig . 65 ) , the force acting on the bob is its weight , and the direction of this force is vertical . Let it be represented by the line OR . The component of this ...
Page 69
... . A body is said to be in stable equi- librium if it tends to return to its original position when very slightly tipped , or rotated , out of that position . A pendulum , a chair , a cube resting on its side , GRAVITATION 69.
... . A body is said to be in stable equi- librium if it tends to return to its original position when very slightly tipped , or rotated , out of that position . A pendulum , a chair , a cube resting on its side , GRAVITATION 69.
Page 71
... pendulum , is that the point of support be above the center of gravity . For example , the beam of a balance cannot be in stable equilibrium , so that it will return to the horizontal position when slightly displaced , un- less its ...
... pendulum , is that the point of support be above the center of gravity . For example , the beam of a balance cannot be in stable equilibrium , so that it will return to the horizontal position when slightly displaced , un- less its ...
Page 72
... pendulum at rest ? Why ? 7. What purpose is served by the tail of a kite ? 8. Do you get more sugar to the pound in Calcutta than in Aberdeen when using a beam balance ? when using a spring balance ? Explain . 9. What change would there ...
... pendulum at rest ? Why ? 7. What purpose is served by the tail of a kite ? 8. Do you get more sugar to the pound in Calcutta than in Aberdeen when using a beam balance ? when using a spring balance ? Explain . 9. What change would there ...
Page 72
... pendulum ; was the creator of the science of dynamics ; constructed the first thermometer ; first used the telescope for astronomical observations ; discovered Jupiter's satellites and the spots on the sun . Modern physics begins with ...
... pendulum ; was the creator of the science of dynamics ; constructed the first thermometer ; first used the telescope for astronomical observations ; discovered Jupiter's satellites and the spots on the sun . Modern physics begins with ...
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Common terms and phrases
ammeter amperes angle armature ball body calories carbon charge circuit coil color condenser conductor connected convex lens copper cubic centimeter Daniell cell density diameter direction distance dynamo earth electric electric charge electroscope engine equal experiment fact fall flame focal length fork freezing friction galvanic cell galvanometer gases glass gram gravity heat Hence hydrogen inch induced iron kinetic energy lamp Leclanché cell lens lever light lines of force liquid mass mechanical advantage mercury metal meter mirror molecules motion moving needle ohms opposite overtone pass pipe piston placed plane plate pole position potential pressure produced pull pump QUESTIONS AND PROBLEMS rays reflected resistance rotation shown in Fig shows sound specific gravity speed steam substances surface temperature thermometer tion tube vapor velocity vessel vibration volts wave length weight wheel wire zinc
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.