Midterm1Sp10b-s

Midterm1Sp10b-s - MidTerm Ib Name: Date: Phys224 Spring...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MidTerm Ib Name: Date: Phys224 Spring 2010 Dr. P. Hanlet Show your work!!! If I can read it, I will give you partial credit!!! Correct answers without work will NOT get full credit. Concept (3 points each) Circle the correct answer: 1. For an isochoric process, restate the First Law of Thermodynamics. (a) Δ E = Q − W (b) Δ E = − W (c) Q = 0 (d) Δ E = Q (e) none of the previous 2. Which statement is true do to the Equipartition Theorem? (a) O 2 gas has <K > = 5 2 kT (b) He gas has <K > = 1 2 RT (c) He gas has <K > = 3 2 RT (d) He gas has <K > = 5 2 kT (e) O 2 gas has <K > = 3 2 RT 3. The following devices are used to deliver heat to the human body: (a) hair dryer (b) heat lamp (c) hot-water bottle By which respective mechanism does each transfer heat? (a) conduction, convection, radiation (b) conduction, radiation, convection (c) convection, conduction, radiation (d) convection, radiation, conduc- tion (e) radiation, conduction, convection (f) radiation, convection, conduction 4. The 2 nd law of thermodynamics, can be stated succintly as: S ≥ 0. Under which condition is S = 0? (a) at STP (b) in an irreversible process (c) when Δ V =0 and Δ T negationslash =0 (d) when Δ T =0 and Δ V negationslash =0 (e) in a reversible process 1 5. The brakes on your car work due to: (a) Bernouli’s principle (b) Archimede’s principle (c) Pascal’s principle (d) in part by each of the above (e) none of the previous 6. Match the following labels to the thermodynamic processes below: (adiabatic, isobaric, isothermal, isochoric, free expansion) V p f 1 f 2 f 3 f 4 700 K 500 K 1 4 i 400 K 2 3 Answer Isothermal Isobaric Ischoric Adiabatic (a) i → f 3 i → f 4 i → f 1 i → f 2 (b) i → f 2 i → f 1 i → f 4 i → f 3 (c) i → f 2 i → f 3 i → f 4 i → f 1 (d) i → f 2 i → f 1 i → f 3 i → f 4 (e) i → f 1 i → f 2 i → f 3 i → f 4 7. Three Carnot engines operate between reservoir temperatures of: (i) 800 K and 1200 K (ii) 800 K and 1000 K (iii) 1200 K and 1600 K Rank the engines according to their thermal efficiences, greatest first: Answer Process (a) (i) (ii) (iii) (b) (i) (iii) (ii) (c) (ii) (i) (iii) (d) (ii) (iii) (i) (e) (iii) (i) (ii) (f) (iii) (ii) (i) 8. Plane waves are frequently used as an approximation to: (a) spherical waves at small radius (b) spherical waves at large radius (c) sound waves at high frequency (d) sound waves in water (e) none of the previous 2 Name: Date: Phys224 Spring 2010 Dr. P. Hanlet Concept (5 points each) 9. Based on the equation: Δ S = S f − S i = nR ln V f V i + nC V ln T f T i why is...
View Full Document

This note was uploaded on 05/01/2010 for the course PHYS 224 taught by Professor Hanlet during the Spring '10 term at Illinois Tech.

Page1 / 10

Midterm1Sp10b-s - MidTerm Ib Name: Date: Phys224 Spring...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online