Q%- a) increases. Physics 201 MWF 9:10 Fall 2009 (Ford) Name (printed) Name (signature as on ID) Lab Section Number
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1 1 Exam IV Chapts in Young/Geller Name (printed) (c) stays the same (b ecreases Q%- a) increases copper plate is heated to 60 C, the diameter of the hole (5 pts) 4. A circular hole in a fiat copper plate has diameter rn at T = 40 C. If the (b) constructive 04%(3iestruc P is a distance of 6.0 m from speaker B. The interference at point P is waves from each speaker is 2.0 m. Point P is a distance of 3.0 rn from speaker A and point (5 pts) 3. Speakers A and B emit sound waves that are in phase. The wavelength of the (e) none of the above answers (d) m (a) m (b) m the length of the pipe? wave for the pipe has frequency 680 Hz. The speed of sound in air is 340 rn/s. What is (5pts) 2. A pipe is open at one end and closed at the other end. The first overtone standing (c) lé than 500 Hz jreater than 500 HJ - I (a) 500 Hz + JOMfr waves with a frequency of 500 Hz. The frequency of sound heard by the listener is train, with a speed of 20 rn/s relative to the ground. The train s whistle is emitting sound a speed of 10 rn/s relative to the ground. The listener is also moving east, toward the (5 pts) 1. A train is due east of a listener and is moving east, away from the listener, with Multiple Choice questions. Circle the correct answer. No work needs to be shown. Physics 201 MWF 9:10 Fall 2009 (Ford) I Name (signature as on ID) Lab Section Number
2 (b) 3.0 J/K (d) 9.4 J/K K and a low-temperature reservoir at T 300 K. In one cycle the engine absorbs 600 (a) 200 J perform in one cycle. On the following problems show all your work. Partial credit will be given if earned. Write your answers in the blanks provided. pressure minus air pressure) at the bottom of the barrel? (d) 800 J on water (density 1000 kg/rn (f) none of the above answers (e) none of the above answers (e) 1800 J (c) /K (5 pts) 6. A Carnot heat engine operates between a high-temperature reservoir at TH = 900 (c) 600 J (12 pts) 7. An open barrel contains a rn deep layer of oil (density 700 kg/rn 3) floating 3) that is m deep. What is the gauge pressure (absolute What is the entropy change of the gas as a result of this process? temperature of 127 C. During the expansion the magnitude of the work W is 1200 J. J of heat energy from the high-temperature reservoir. How much work does the engine (5 pts) 5. One mole of an ideal gas undergoes a reversible isothermal expansion at a
3 J/(kg.K), Lf = 3.34 x iü J/kg and L = 2.26 x 106 J/kg.) 1o has the value I = W/m izr kg of liquid water at T = 10 C? (For ice, c = 2010 J/(kg.K). For water c 4190 (12 pts) 9. How much heat must be supplied to kg of ice at T = 40 C to produce O.031 IW 2.) What is the power output of the source? distance of 50 m from the source the sound intensity level is 60 db. (The reference intensity (12 pts) 8. A point source of sound waves emits sound uniformly in all directions. At a
4 (b) Calculate the density of the liquid. c5 kj N (a) Calculate the force the liquid exerts on the rock. pended from a light string and totally immersed in a liquid the tension in the string is 4.0 N. (16 pts) 10. A rock has mass 0.60 kg and volume 2.0 x i0 m3. When the rock is sus
5 (5 pts) (a) isothermal (constant temperature) (8 pts) (c) isobaric (constant pressure) (5 pts) (b) adiabatic (Q = 0) in internal energy of the gas if the process is 0 _LfOOcf (18 pts) 11. A sample of monatomic ideal gas expands to twice its original volume and 400 J of work is done by the gas in the process. For the gas, Cv = 3R/2. Find the change
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