. Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools . ce? Ans. 32-984 feet per second. 408. In the last example, if the water flows into a vacuum, whatis its velocity ? Ans. 56 feet per second. Note.—.Since the pressure of the atmosphere is equal to that of acolumn of water 32 feet high, the effective height of thecolumn of water is 17 -f 32 = 49 feet. 409. How much wa
. Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools . ce? Ans. 32-984 feet per second. 408. In the last example, if the water flows into a vacuum, whatis its velocity ? Ans. 56 feet per second. Note.—.Since the pressure of the atmosphere is equal to that of acolumn of water 32 feet high, the effective height of thecolumn of water is 17 -f 32 = 49 feet. 409. How much water is discharged per minute from an aperturehaving an area of \; of an inch—the surface of the fluid beingkept constant at 36 feet? Am. 2^ cubic feet. 410. What must be the area of the aperture in the bottom of avessel in order that 90 cubic feet of water may issue perhour—the level of the water in the vessel being constantlykept at 20 feet above the centre of the orifice ? Ans. 161 or about /^ of an inch. 411. A vessel contains 20 cubic feet of water, which fills it tothe depth of 30 feet—now, if an aperture having an area ofI of an inch be made in the bottom of the vessel, in wbat ime will it empty itself? A)is. 2 min. 30^ sec. 150 HYDRODYNAMICS. [Arts. 333, 333. When water spouts from several apertures in tlieside of a vessel, it is thrown with tlie greatest random fromthe orifice nearest the centre, the jet issuing from the centrewill reach a horizontal distance equal to the entire heightof the liquid, and all jets equally distant from the centrewill be thrown to an equal horizontal distance. Fig. 29. XoTE,...T-et VAhesi vessel /^ filed With water, lia\iug itsside ^fiperijeudicular to thehorizontal piano BM. On ABdescribe tbe semicircle ^5inC&nd in AB takeany points i>and D eciuallydiscaut from E, also C and Cequally distant from E. Drawal50 CC, DD, EE, &c., per-pendicular to AB and pro-duce to the circumferenceABC. Then if small oriucesbe pierce
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectphysics, bookyear1867
