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Chap-2 problems - 2-3 2.2.1 Bourdon gages(see Vidcc V2.3...

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2-3
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2.1.1 2..2.1 Bourdon gages (see Vidcc) V2.3 and Fig. 2.13) are commonly used to measure pressu~. When such a gage is attached to Ihe closed water lank of Fig. P2.1./ the gage reads 5 psi. What is the absolute air preSSlife in the tank? Assume standard atmospheric pressure of 14.7 psi. f=-d-h + Po -p,.,t -(ft H) ~D ~/j. --b. = I's!k Ib ) ft1/r (:; In. z. -t /1/. 7 J1.~ - (/ Pt)(tl.lfL! ) ~~t~ .ft:~ .FIGURE P2.~1 t,; = Jr..? 1'-"fl. --- 2-/8
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2.2.2 2.22 On the suctionsideofa pump a Bourdon pressure gage reads 4O-kPavacuum. What is the corresponding absolute pressure if the local at- mospheric pressure is 100 kPa (abs)? -'fb i ~ 1- !Of) ""Pa. tot) '" ~ =, = :" 2.24 A water-filled V-tube m ~ ometer is used to measure the pressure inside a tank that contains air. e water level in the V-tUbe on the side that connects to the tank is 5 above the base of the tank. The water level in the other side of the U tUbe (which is open to the atmosphere) is 2 ft above the base. Delermipe the pressure within the tank. or fair 2~/9
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2-21
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t. Zq Hemispherical dome /SG = 0.8 4m +- 3m ~ 2m -L Water (tl) /".3 .k~ = (6 ) -= oft'.!.. X1O3 N -{ = -Pc 1)1'11- 3 N all.1. X}b -2- /tt' /33)( ID!~ /!If" -- ~ &.2,3tJ.-m 4'JI, = z~~~ ~ 2.2."f I .F1GU F\ E P2..2.q
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2-27
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2.l!O 2..!/-0 The inverted U.tu~ manometer of Fig.
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