HW soln ch2 - 2. 2] Bourdon gages (see Video V2.3 and Fig....

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Unformatted text preview: 2. 2] Bourdon gages (see Video V2.3 and Fig. 2%.?) are commonly used to measure pressure. When such a gage is attached to the closed water tank of Fig. P21! the gage reads 5 psi. What is the absoiutc air pressure in the tank? Assume standard atmospheric pressure of 24.7 psi. £2 in. Bourdon gage , - l / ' I?" (53:17" H7731)" ff pfi)[414é§3) : FIGURE 22.2.: E”; 3 755L'é Ww~ Closed vaivc— 2.28 A U-tube manometer is connected to a Closed tank containing air and water as shown in Fig. P228. A: the closed ' end of the manometer the air pressure is i6 psia. Determine the reading on the pressure gage for a differentiai reading of 4 f1 (1) on the manometer. Express your answer in psi (gage). Assume * standard atmospheric pressure, and neglect the weight of the air columns in the manometer. Gagefnnd (y: 901mm P'BSSWG gage ..., .m-m-gmmnmmummw v. 2.35 The cyclindrica! tank with hemispherical ends shown in Fig. P235 contains a voiatile liquid and its vapor. The liq- uid density is 800 kg/ma, and its vapor density is negligible. The pressure in the vapor is 120 kPa (abs), and the atmospheric pressure is 101 kPa (abs). Determine: (a) the gage pressure read- ing on the pressure gage; and (b) the height. h, of the mercury manometer. —. -——-- “Wm—r. ~.-- r ,_ _.I._. .‘_... hw_g_e 2.38 An air-filled, hemispherical shell is at— tached to the ocean floor at a depth of 10 m as, shown in Fig. P232. A mercury barometer lo-: cated inside the shell reads 765 mm Hg, and a mercury U~tube manometer designed to giVe the outside water pressure indicates a differential reading of 735 mm Hg as illustrated. Based on these data what is the atmospheric pressure at the ocean surface? 151’: .' 7% ~ aha/pie m}- pres'sare Iris/dc shei/ Mercury Shell . / . FIGURE £52.33 53:. .1" 4! 2:5.” 5 u r7541: 6; (can asp/79145 )DVt’SSu re 33W “V Specif/t Adair/1i 075 SEQRJL‘éEV‘ Thus) mmwmeérr €5d¢éibfi CM fie wmeéem as fizz/m + 3;” (fig/m) + 3;” 369%) “e 23;}; (0,7354%) Jo 771415 X (0.73544) “‘3 gMMWM/l (0.7(053m) :7 2- 61 A honmgeneous. 4-fttwide. 841—1031;; reclanguiarga:e weighing 800 lb is held in place by a i101'iZOlltili flexibie cable as shown in Fig. P2.6I Water acts agaiasl the gate which is hinged at point A. Friction in the hinge is negligibie. Determine the tension in {he cable. / 3 , : + 37614: ’fié ’3 (37%)(éfix’ffl) Er efaJ/z'ériym) EMA, 3'0 and 7‘ fmfimwfl s.- %(m)(aW)—+ ,5; (24) 7-, 0W “ (5 75f)(51'n 60°) ‘2: 2 02 1.102 An inverted test tube panially filled with air floats in a plastic water-filled soft drink bottle as shown in Videu VB. 7 and Fig. P2.lG?-.The amount of air in the tube has been adjusted so that it just floats. The bottle cap is securely fastened. A siight squeezing of the plastic bottle will cause the test tube to sink to the bottom of the bottle. Explain this phenomenon. IVAN? 7778 4:51!” ékée is floaémj 771.: M61952: do“ 77:: £14.55le 1'; éalcnced 6:, 772: éaoywz‘ ,4ng F25 . / a; S/fél’l! It; WC. 7431??? . 77‘: $g§y¢fff #9 Va- :3 fiat :51:. "fire displaced mic/me éfwdéay 4.5 57519141”. 73:13 (flip/dd”? Var/r1ng a dial 2%: 7‘?“ W)“ PFPSS'l/flf; 7g flag/acct n; 771: fab: to)!sz 73:- k/Iltn "/72: [.5 574667010 “77:: 4;}- Press”: In 7713 W: 43) f5 Mei/eased shy/:77; M6! 77:51]»: £107: xncrmses 721g pram/re Com/)reSs/‘nj The mi— m 731: ’éaszé-éuée. 77935 fl: 0759/}: 95/ Vv/e’m¢ 1.3 {z’ecrmyd (J71) a subsrgwaé decree“ 2/: 7%, ‘ S/nég ’24 A} Lav/151515715) a decrease 04 F8 WI/f (was! 7716 "£45215 ‘éuég 40 Ink. 0—H): H FFGURE P2.l02 Voi'umé’ ____.., www.___ww r , 2.!053 When a h ydmmctez' (see Fig. PEJOSzmd Vkien V3.8} hen» ing. a stem diamewr of 0.30 in. is placed in water. the stem pm» 1 E i FEUIC nudes 3.15 in. above the water surface. If the water is replaced Hydrameierm —' surgacze With a llquid having a specific gravity of 1. :0. how much of the R7 : i 5mm “’mlld PI‘OH'aIde above me iiquid surface? The lwydwn‘mm‘ “27" “*3” 7:31:53—F": weighs 0.042 1b. I k ::»_:1:~‘“'3’:'_ E {j K g €32J05 WWI? +6: hydmmcffy 15 Floaéihg [*5 weight 70113 balanced by J . 47m hwy/{m4 érce/ FEW figuilzbn 21m , Z Fi/eerca/ 774%, AV WnH’V (a; w = ‘Ld 7.67 l Luigch 173 [:5 771a ju}m6}’§€a{ Lia/ameJ/Urfh The new his“? :0 (2) (56:) (Kim ) i7: :flu (Elwin/Jam}- 5375,01 427.4(2) M751 % gammy; t cam = (smww JV‘: 56? Wu! K: (Can’t) ...
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HW soln ch2 - 2. 2] Bourdon gages (see Video V2.3 and Fig....

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