An Introduction to Natural Philosophy: Designed as a Text Book for the Use of the Students in Yale College : Compiled from Various AuthoritiesRobert B. Collins, 1850 - 592 pages |
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acts angle angle of friction applied atmosphere axis axle ball beam body center of gravity centrifugal force circumference colors column common condensed conductor consequently convex convex lens cycloid cylinder depth descend diameter diminished direction distance earth effect elasticity electricity electrometer equal equilibrium experiments fall feet fluid force friction fulcrum given glass greater heat Hence horizontal inches inclined plane increased iron length lens less lever Leyden jar light machine magnet matter mechanical mechanical advantage miles motion move Natural Philosophy needle object opposite orifice parallel particles passing pendulum perpendicular pipe piston placed pole portion pounds pressure principle produced pulley quantity quicksilver radius ratio rays reflexion refracting telescopes refraction resistance rest screw side solid sound specific gravity spherical aberration square steam string substance supposed surface tion tricity tube valve velocity vessel vibrations weight wheel wind
Popular passages
Page 503 - When one medium is a vacuum, n is the ratio of the sine of the angle of incidence to the sine of the angle of refraction. retardation, S — optical path difference between two beams in an interferometer; also known as "optical path difference
Page 339 - ... is equal to the weight of a column of water whose base is the section of the piston, and whose height is the distance of the level of the water in the barrel AC, above the level in the reservoir.
Page 470 - That in the same plate of steel, of the size of a few square inches only, portions are found varying considerably in their capability of receiving magnetism, though not apparently differing in any other respect.
Page 337 - Hence the total pressure upon the side of a vessel containing water will be equal to the weight of a column of water whose base is equal to the area of...
Page 381 - was ever written upon the subject of electricity, which was more generally read and admired in all parts of Europe, than these letters. There is hardly any European language into which they have not been translated ; and, as if this was not sufficient to make them properly known, a translation of them has lately been made into Latin.
Page 139 - DB ; hence, (Art. 177,) the time of one vibration will be to the time of a body's falling freely down half the length of the pendulum, as the circumference of a circle to its diameter.
Page 287 - A very slight declivity suffices to give the running motion to water. Three inches per mile, in a smooth straight channel, gives a velocity of about three miles per hour. The Ganges, which gathers the waters of the Himalaya mountains, the loftiest in the world, is, at eighteen hundred miles from its mouth, only eight hundred feet above the level of the sea — that is, above twice the height of St.
Page 340 - The entire force used in raising the water, will be found by adding the force necessary to elevate the piston to that which is necessary to depress it. As in this case the weight of the piston and rods increases the one...
Page 281 - ... to their necks, so that in their frequent falls overboard, they are not in danger. Life-boats have a large quantity of cork mixed in their structure, or of air-tight vessels of thin copper or tin plate; so that, even when the boats are filled with water, a considerable part still floats above the general surface. Swimming is much easier to quadrupeds than to man, because the ordinary motion of their legs in walking and running is that which best supports them in swimming.
Page 114 - The pulley is a small wheel, movable about its axis by means of a cord, which passes over it. When the axis of a pulley is fixed, the pulley only changes the direction of the power ; if movable pulleys are used, an equilibrium is produced, when the power is to the weight, as one to the number of ropes applied to them.