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### hw09b

Course: PHYS 25100 13843, Spring 2011
School: IUPUI
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Word Count: 681

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(faa335) aljabr Hw09 Ross (89251) This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 2) 10.0 points The current I = a t2 b t + c in a section of a conductor depends on time. What quantity of charge moves across the section of the conductor from t = 0 to t = t1 ? 1. q = a t2 b t1 + c 1 a3 b2 t t + c t1...

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(faa335) aljabr Hw09 Ross (89251) This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 2) 10.0 points The current I = a t2 b t + c in a section of a conductor depends on time. What quantity of charge moves across the section of the conductor from t = 0 to t = t1 ? 1. q = a t2 b t1 + c 1 a3 b2 t t + c t1 correct 31 21 b 3. q = a t3 t2 + c t1 1 21 2. q = 4. q = a t3 b t2 + c t1 1 a3 b2 t t +c 31 21 Explanation: The unit of current is Coulomb per second dq I= or dq = I dt. dt To nd the total charge in coulombs that passes through the conductor, one must integrate the current over the time interval. 5. q = t1 t1 1 Let : a = 3 C/s3 , b = 3 C/s2 , c = 8 C/ s , t1 = 2 s , and t2 = 4 s . t2 Since a3 b2 q= t t + ct 3 2 then 3 C/s3 3 C/s2 3 q2 = (4 s) (4 s)2 3 2 + (8 C/s)(4 s) = 72 C , and q1 = 3 C/s3 3 C/s2 (2 s)3 (2 s)2 3 2 + (8 C/s)(2 s) = 18 C . q21 = q2 q1 = 54 C . 003 10.0 points Calculate the average drift speed of electrons traveling through a copper wire with a crosssectional area of 50 mm2 when carrying a current of 10 A (values similar to those for the electric wire to your study lamp). Assume one electron per atom of copper contributes to the current. The atomic mass of copper is 63.5 g/mol and its density is 8.93 g/cm3 . Avogadros number NA is 6.02 1023 . Correct answer: 1.47651 105 m/s. Explanation: Let : N = 1 , M = 63.5 g/mol , = 8.93 g/cm3 , A = 50 mm2 = 5 105 m2 , I = 10 A , and qe = 1.6 1019 C/electron . , t1 so that q= 0 t1 dq = 0 I dt = 0 (a t2 b t + c) dt t1 0 = a3 b2 t t + ct 31 21 b a = t 3 t 2 + c t1 . 1 3 21 002 (part 2 of 2) 10.0 points If I is in A, and a = 3 C/s3 , b = 3 C/s2 , and c = 8 C/s, what quantity of charge moves across the section of the conductor from t1 = 2 s to t2 = 4 s? Correct answer: 54 C. Explanation: aljabr (faa335) Hw09 Ross (89251) We rst calculate n, the number of currentcarrying electrons per unit volume in copper. Assuming one free conduction electron per NA n atom, = , where NA is Avogodros M number and and M are the density and the atomic weight of copper, respectively n 1 electron atom NA . M 2 stretched to a length , the volume will remain the same. The new cross-sectional area is then, A = A A A A A = = = . 1.86 1.86 The resistance of a conductor of resistivity is given by R= , A so R A (1.86 ) A =A= = A R A A 1.86 = (1.86)2 . Thus R = (1.86)2 R = 3.4596 R . 005 10.0 points A 0.59 V potential dierence is maintained across a 1.8 m length of tungsten wire that has a cross-sectional area of 0.79 mm2 and the resistivity of the tungsten is 5.6 108 m. What is the current in the wire? Correct answer: 4.62401 A. Explanation: Let : V = 0.59 V , = 1. 8 m , A = 0.79 mm2 = 7.9 107 m2 , = 5.6 108 m . The resistance is R= V = , I A and n= 6.02 1023 atoms 63.5 g/mol 106 cm3 8.93 g/cm3 1 m3 = 8.46592 1028 electrons/m3 . 1 electron atom Drift Speed in Copper Wire vd = = I n qe A 10 A 8.46592 1028 electrons/m3 1 19 C/electron 1.6 10 1 5 105 m2 = 1.47651 105 m/s . 004 10.0 points A wire with a resistance R is lengthened to 1.86 times its original length by pulling it through a small hole. Find the resistance of the wire after it is stretched. Correct answer: 3.4596 R . Explanation: Let : = 1.86 . The volume V of the wire is given by V = A, where is the length of the wire and A is the cross-sectional area. When the wire is so the current is VA I= (0.59 V) (7.9 107 m2 ) = (5.6 108 m) (1.8 m) = 4.62401 A . aljabr (faa335) Hw09 Ross (89251) 006 (part 1 of 2) 10.0 points An electric heater operating at full power draws a current of 9.3 A from a 191 V circuit. What is the resistance of the heater? Correct answer: 20.5376 . Explanation: Let : I = 9.3 A and V = 191 V . From Ohms law, R= 191 V V = = 20.5376 . I 9. 3 A 3 007 (part 2 of 2) 10.0 points Assuming constant R, how much current should the heater draw in order to dissipate 950 W? Correct answer: 6.80122 A. Explanation: Let : P = 950 W . Since P = I 2 R, I1 = P = R 950 W = 6.80122 A . 20.5376
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IUPUI - PHYS 25100 - 13843
Version One Homework 9 Savrasov 39819 May 15, 2006 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Changing Magnetic Field 31:01, t
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW10 Betancourt (16856) This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 27.1-27.8 001 10.0 points A charged particle is projected with its init
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw10 Ross (89251) This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points The emf of a battery is E = 16 V . When the battery delivers a cu
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW11 Betancourt (16856) This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 28.1-28.5 001 10.0 points The segment of wire in the gure carries a curr
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw11 Ross (89251) This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 23 V 10.0 points 5. 1 Multiplying Eq. (1) by r2 , Eq. (2) by r1 , E1 r2 = i1 r
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW12 Betancourt (16856) This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 28.6-28.8 001 (part 1 of 4) 10.0 points The gure below shows a straight
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw12 Ross (89251) This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 3) 10.0 points The magnetic eld over a certain range is given by B
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW13 Betancourt (16856) This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 29.1-29.3 001 10.0 points An 18.1 turns circular coil with radius 7.72
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw13 Ross (89251) This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points The segment of wire in the gure carries a current of 6 A, where th
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW14 Betancourt (16856) This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 29.4-29.7 001 10.0 points A rectangular loop located a distance from a
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw14 Ross (89251) This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 4) 10.0 points The gure below shows a straight cylindrical coaxial
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW15 Betancourt (16856) This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 30.1-30.6 001 (part 1 of 3) 10.0 points A 23.2 mA current is carried by
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw15 Ross (89251) This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points A 62.4 turns circular coil with radius 4.12 cm and resistance 6.5
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW16 Betancourt (16856) This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 31.1-31.6 001 (part 1 of 2) 10.0 points When a particular inductor is c
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw16 Ross (89251) This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points A rectangular loop located a distance from a long wire carrying a
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW17 Betancourt (16856) This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 32.1-32.6 001 10.0 points In a particular medium the speed of light is s
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW18 Betancourt (16856) This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 33.1-33.6 001 (part 1 of 3) 10.0 points Batman and Robin are attempting
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw18 Ross (89251) This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 3) 10.0 points A 27.7 mA current is carried by a uniformly wound a
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW19 Betancourt (16856) This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 34.1-34.4 001 (part 1 of 3) 10.0 points A concave mirror has a focal le
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw19 Ross (89251) This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 2) 10.0 points In the purely inductive circuit in the gure below,
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW20 Betancourt (16856) This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 34.5-34.8 001 10.0 points The magnication produced by a converging lens
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw20 Ross (89251) This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 3) 10.0 points A plane electromagnetic sinusoidal wave of frequenc
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW21 Betancourt (16856) This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 17.1-17.6 001 (part 1 of 2) 10.0 points At 11 C, an aluminum ring has an
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw21 Ross (89251) This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points In the gure, a ray of light enters the liquid from air and is ben
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW22 Betancourt (16856) This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 17.6-17.7 001 10.0 points Given: specic heat of water = 1 cal/(g C) . Ho
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw22 Ross (89251) This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 2) 10.0 points An object is p = 48 cm in front of a concave mirror
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW23 Betancourt (16856) This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 18.1-18.5 001 (part 1 of 2) 10.0 points An air bubble originating from
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw23 Ross (89251) This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 3) 10.0 points A diverging lens has a focal length of 24 cm. An ob
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW24 Betancourt (16856) This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 19.1-19.8 001 (part 1 of 2) 10.0 points One mole of an ideal gas does 3
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw25 Ross (89251) This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points The density of gasoline is 730 kg/m3 at 0 C. One gallon of gasolin
IUPUI - PHYS 25100 - 13843
aldawsari (ma28683) HW26 Betancourt (16856) This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 20.3-20.7 001 10.0 points The eciency of a 905 MW nuclear power plant is
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw26 Ross (89251) This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points Given: The specic heat of air is approximately 1 kJ/kg C. Take the
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw27 Ross (89251) This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points Pure helium gas is admitted into a tank containing a movable pist
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw28 Ross (89251) This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 2) 10.0 points One mole of an ideal gas does 1296 J of work on the
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw29 Ross (89251) This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 (part 1 of 3) 10.0 points Three moles of a certain diatomic molecular gas are
IUPUI - PHYS 25100 - 13843
aljabr (faa335) Hw30 Ross (89251) This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points The eciency of a 846 MW nuclear power plant is 18.5 %. If a river
IUPUI - PHYS 25100 - 13843
Version One Homework 1 Savrasov 39821 Apr 02, 2007 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Field in the Middle 23:07, trigon
IUPUI - PHYS 25100 - 13843
Version One Homework 2 Savrasov 39821 Apr 16, 2007 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Point Charge in a Cube 24:02, tri
IUPUI - PHYS 25100 - 13843
Version One Homework 3 Savrasov 39821 Apr 16, 2007 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Potential Energy and Potential 01
IUPUI - PHYS 25100 - 13843
Version One Homework 4 Savrasov 39821 Apr 16, 2007 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Air Filled Capacitor S 26:02, tri
IUPUI - PHYS 25100 - 13843
Version One Homework 5 Savrasov 39821 Apr 16, 2007 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Current in a Conductor 01 27:01,
IUPUI - PHYS 25100 - 13843
Version One Homework 6 Savrasov 39821 May 14, 2007 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Lamps in Series 28:03, trigonome
IUPUI - PHYS 25100 - 13843
Version One Homework 7 Savrasov 39821 May 14, 2007 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Electron in a Magnetic Field 02 2
IUPUI - PHYS 25100 - 13843
Version One Homework 8 Savrasov 39821 May 14, 2007 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. BiotSavart Law 30:01, trigonometr
IUPUI - PHYS 25100 - 13843
Version One Homework 9 Savrasov 39821 May 14, 2007 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Induced EMF for a Wire Loop 31:01
IUPUI - PHYS 25100 - 13843
Version One Homework 1 savrasov 39822 Sep 28, 2007 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Jet in Flight 02:02, trigonometry,
IUPUI - PHYS 25100 - 13843
Version One Homework 2 savrasov 39822 Oct 08, 2007 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Serway CP 03 14 04:01, trigonometry
IUPUI - PHYS 25100 - 13843
Version One Homework 3 savrasov 39822 Oct 15, 2007 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Accelerating Elevator 05:04, trigon
IUPUI - PHYS 25100 - 13843
Version One Homework 4 savrasov 39822 Oct 24, 2007 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Kinetic Energy of a Car 07:02, tri
IUPUI - PHYS 25100 - 13843
Version One Homework 5 savrasov 39822 Oct 31, 2007 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Climbing a Rope 08:01, trigonometry
IUPUI - PHYS 25100 - 13843
Version One Homework 6 savrasov 39822 Nov 05, 2007 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Inelastic Collision of Cars 09:06,
IUPUI - PHYS 25100 - 13843
Version One Homework 7 savrasov 39822 Nov 13, 2007 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Serway CP 07 18 10:02, trigonometry
IUPUI - PHYS 25100 - 13843
Version One Homework 8 savrasov 39822 Nov 13, 2007 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Solid Sphere on an Incline 05 11:02
IUPUI - PHYS 25100 - 13843
Version One Homework 9 savrasov 39822 Nov 13, 2007 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Sphere Held Against a Wall 01 12:01
IUPUI - PHYS 25100 - 13843
Version One Homework 10 savrasov 39822 Dec 05, 2007 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. The due time is Central time. Tipler PSE5 14 104 13:01, calculus
American International - ETH - 125
The first database I used was Proquest. I typed Academic Honesty in the search bar. The article that came out was titled, Academic dishonesty in online courses. The author of the article was Chase Artyce- Joy E. The publication of the article was in 2010
American International - ECON - 125
I performed the light skinned versus dark skinned test on IAT. The results from my test showed that I favor dark skinned versus light skinned people. I do think the test produced valid results. I have a brother that is a darker skinned African American. I
Texas A&M - ISEN - 302
Solutions to EndofChapter ProblemsChapter 11.1 Engineering economy will help you pick the most economical alternative from the ones that have been identified. It will not help you identify what the alternatives are. 1.2 Revenues and costs are examples o
Texas A&M - ISEN - 302
Chapter 22.1 (a) (F/P,10%,20) = 6.7275 (b) (A/F,4%,8) = 0.10853 (c) (P/A,8%,20) = 9.8181 (d) (A/P,20%,28) = 0.20122 (e) (F/A,30%,15) = 167.2863 2.2 F = 180,000(F/P,10%,3) = 180,000(1.3310) = \$239,580 2.3 F = 2,700,000(F/P,20%,3) = 2,700,000(1.7280) = \$4,
Texas A&M - ISEN - 302
Chapter 3 3.1 Effective 3.2 Simple: F = P + Pni = 20 + 20(1)(0.18) = \$23.6 million Compound: F = 20(1 + 0.18)1 = \$23.6 million Difference = 23.6 23.6 = \$0 3.3 (a) Quarter 3.4 (a) 2 3.5 (a) 12 (b) 6 (b) 3 (b) Semiannual (c) 1 (c) 24 (b) r = 0.04*2 = 8% (c
Texas A&M - ISEN - 302
Chapter 4 4.1 Do-nothing (DN) represents the status quo and is understood to always be an option. If one of the projects absolutely must be selected, the DN alternative is present, it simply will not be selected when the final selection is made. 4.2 (a)