## Practical Physics |

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acting amount applied atmosphere attraction ball become body bottom called cause cell centimeter charge closed coil connected containing cooling cubic density direction distance earth effect electric energy engine equal exactly example exerted experiment Explain fact fall feet force friction gases given glass gram gravity greater heat Hence inch increase induced iron kinetic length lever lifted light liquid lower machine magnet mass means measure mechanical mercury meter method molecules motion moving observed opposite pass placed plane plate pole position potential pounds pressure principle produced pull pump represents resistance resultant rise seen shown in Fig shows side simply solid sound speed square steam substances surface temperature thermometer tube unit vapor velocity vessel vibration volume wave weight wheel wire

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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.