A Treatise on Hydrostatics and PneumaticsCary, Lea, & Company, 1832 - 273 من الصفحات |
عبارات ومصطلحات مألوفة
A B C D acting amount apparent weight appears ascend ascertained atmospheric pressure ball balloon barometer barrel body bottle bottom bulk for bulk buoyancy cause centre of gravity cistern column of water condensed contained continue cork counterpoise cubic inch cylinder depth descend dimensions diminished direction dish diving bell division effect elastic force elevation equal equilibrium explained filled with water float fluid glass grains greater heat heavier Hence hydrometer hydrostatic hydrostatic pressure inch of mercury increased instrument less Let us suppose lighter lower magnitude mechanical mercury mersed motion mouth move necessary observed orifice particles piston placed position pounds poured pressed principle produced proportion pump quantity of water raised rarefaction receiver remain represented in fig reservoir resistance rise screw sink space specific gravity square inch stopcock stratum substance surface F suspended sustain a pressure syringe temperature tendency tion transmitted valve velocity vessel A B wheel
مقاطع مشهورة
الصفحة 79 - If a solid lighter than a fluid be forcibly immersed in it, the solid will be driven upwards by a force equal to the difference between its weight and the weight of the fluid displaced.
الصفحة 36 - Illustrate in •IctaiZ. be pressed upwards by a force equal to the weight of a column of the liquid whose cross-section is that of the cube, and whose height is the distance of c from the surface of the fluid. The face...
الصفحة 199 - ... (4.) If fair weather continue for several days, during which the mercury continually falls, a long succession of foul weather will probably ensue; and again, if foul weather continue for several days, while the mercury continually rises, a long succession of fair weather will probably succeed. (5.) A fluctuating and' unsettled state in the mercurial column indicates changeable weather.
الصفحة 77 - ... in succession applied to draw up this weight, a variation will exist in their intensity in every successive stage, or position of the body in its ascent, and the limit of these forces will be contained between, — nothing, and the difference between the weight of the body, and that of an equal bulk of the fluid. Further, if additional forces be applied until the body is completely drawn from the water, it is manifest that the scale...
الصفحة 198 - The following rules may generally be relied upon, at least to a certain extent : — 1 . Generally the rising of the mercury indicates the approach of fair weather : the falling of it shows the approach of foul weather. 2. In sultry weather the fall of the mercury indicates coming thunder. In winter the rise of the mercury indicates frost. In frost its fall indicates thaw : and its rise indicates snow. 3. Whatever change of weather suddenly follows a change in the barometer may be expected to last...
الصفحة 208 - Torricelli concluded that the rise of liquids in exhausted tubes is due to the pressure of the atmosphere acting on the surface of the mercury in the dish.
الصفحة 186 - ... energy of that power must be the weight of the column of water ; and, consequently, if another liquid be used, heavier or lighter, bulk for bulk, than water, then the same force must sustain a lesser or greater column of such liquid. By using a much heavier liquid, the column sustained would necessarily be much shorter, and the experiment in every way more manageable.
الصفحة 19 - The pressure of a liquid on any surface immersed in it is equal to the weight of a column of the liquid whose base is the...
الصفحة 198 - Because, it is observed that the changes of weather are indicated, not by the actual height of the mercury, but by its change of height. One of the most general, though not absolutely invariable, rules is, that when the mercury is very low, and therefore the atmosphere very light, high winds and storms may be expected. The following rules may...
الصفحة 253 - A body immersed in a fluid ascends or descends with a force equal to the difference between its own weight and the weight of an equal bulk of fluid ; the resistance or viscosity of the fluid not being considered.