final132_2077 - PHY 132 Final Exam Name: _ Q.1 Q.2 Q.3 Q.4...

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PHY 132 Final Exam Name: _____________________ Q.1 Q.2 Q.3 Q.4 Q.5 Q.6 Q.7 Total Directions: Read each problem carefully, and make sure you understand. Please show your work. Even if you give a correct answer with no correct supporting physical reason you will not receive any credit. Partial credit is possible only if I can follow your work. Make sure your answers are given with appropriate sig figs and units. Check if your answer is physically reasonable. Some useful formulas (Use at your own risk): PV = nRT R = 8.314 J/mol- K Q = mc " T 1cal = 4.18 J L f ( water ) = 80.0 cal/g K Q = nC " T # = C P C V W by = pdV $ c water = 1.0 cal/g K c ice = 0.5 cal/g K " E = Q + W on dS = dQ T E = 3 2 nRT pV = constant g = 9.8 m/s 2 Av = constant % gh + 1 2 v 2 + p = constant p = p 0 + gh p = F / A F g = GMm r 2 G = 6.673 & 10 -11 N.m 2 /kg 2 L = conserved a = v 2 r f s = μ s N ' = k m = g l x = x 0 cos t + ( ( ) U = - GMm r v = T ) f = f v + v O v * v S 1 atm =1.013 & 10 5 Pascals water = 1.0 kg/m 3
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1. A monatomic gas follows the process 1 ! 2 ! 3 as shown in the figure. (a) How much heat is needed (or released) for the process 1 ! 2? Give your answer in Joules. (b) How much heat is needed (or released) for the process 2 ! 3? Give your answer in Joules. (c) Is it possible to go from 3 back to 1 through adiabatic compression? Comment.
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I (^., Q= vtCp zT Cn=Eac*--*-;-3-tS (L) Q'- n C'/ ^r ?rv, '- ttf. ?, ,t, - ^RD q'- 2 L ,"e (rr-T"; = (c) N " i1- i" '-t' J.@ t -+l'<4A +^T"r4-"' "-i4 C, -' 1K 2 r\k,4- t-'/, L 1 (sos "i* t't^' 3 ct-J'q q) T 3 a'.*- "n 4- b^'^+ d%"
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2. A large closed bag of plastic contains 0.10 m 3 of helium at an initial temperature of 10 ° C and at the same pressure as the surrounding atmosphere, 1.0 atm. You place this bag in the sun and let the gas warm up and expand to 0.11 m 3 . During this process, the gas absorbs 840 cal of energy by heat. Assume the bag is large enough so the gas never strains against it.
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final132_2077 - PHY 132 Final Exam Name: _ Q.1 Q.2 Q.3 Q.4...

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