Practical Physics |
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Common terms and phrases
air pump ammeter amperes angle Archimedes ball body Boyle's law calories cell center of gravity charge circuit coil color conductor copper cubic centimeter Daniell cell density diameter direction distance earth electric electroscope engine equal exactly exerted experiment fact fall feet force acting friction galvanic cell galvanometer gases glass gram heat Hence hydrogen inch induced iron kilogram kinetic energy lens lever lifted light liquid machine magnet mass measure mechanical advantage mercury meter molecules motion moving needle ohms opposite pass pendulum pipe piston placed plane plate pole position pounds pressure produced pull pulley QUESTIONS AND PROBLEMS rays resistance rise rotating shown in Fig shows solid specific gravity speed square steam substances surface temperature thermometer tion tube unit valve vapor velocity vessel vibration volts volume wave length weight wheel wire zinc
Popular passages
Page 452 - 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 397 - The. magnifying power of an astronomical telescope is therefore the focal length of the objective divided by the focal length of the eyepiece.
Page 371 - 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 68 - Or otherwise, it is the point at which the entire weight of the body may be considered as centered, or through which it may be considered as acting.
Page 60 - ... the resultant of two parallel forces acting in the same direction is equal to the sum of the two forces.
Page 262 - 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 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 22 - Therefore the specific gravity of a solid or a liquid body, is the ratio of its weight to the weight of an equal volume of water...
Page 9 - ... (Fig. 3), and drop in it a piece of sulphur which has been weighed. A quantity of water will then escape into the dish below, equal in bulk to the sulphur. Weigh the escaped water in the lesser vessel. If the sulphur weighed two ounces, the water will weigh an ounce. That is, the sulphur weighs twice as much as an equal volume of water ; its specific gravity is therefore two.