PHYSICS 180a, Fall 2000 Exam Reviews

Answers to Even-Numbered Exam 2 Review Problems

• 10.16P* (a) 3.7 m/s; (b) 1.3 N s; (c) 180 N.
• 10.24E* 2.7 m/s, 1400m/s
• 15.14E* 2.0
• 15.36P* 5
• 19.26E* 94.6 l
• 19.42P* 33 m^2
• 19.50E* (a) A->B: Q+, W+; B->C: W=0, DeltaEint+, C->A: Q-, W-, DeltaEint- (b) -20 J
• PS19.92* (b) 13.1 cm and 39.3 cm
• 21.14P*  1: isothermal: dE = 0, Q = W = pV ln(2), isochoric: W = 0, dE = Q = 4.5pV
            2:  isothermal: dE = 0, Q = W = -pV ln(2), isobaric: W = 3pV, Q = 7.5pV, dE = 4.5 pV
            e) dS = 4 n R ln(2)
• 21.32P* 1.67, monatomic, 75%
• PS21.68* 49.4kJ, 7.4 kJ