# Register now to access 7 million high quality study materials (What's Course Hero?) Course Hero is the premier provider of high quality online educational resources. With millions of study documents, online tutors, digital flashcards and free courseware, Course Hero is helping students learn more efficiently and effectively. Whether you're interested in exploring new subjects or mastering key topics for your next exam, Course Hero has the tools you need to achieve your goals.

5 Pages

### Practice Midterm 2

Course: PHYS 1B, Spring 2007
School: UCLA
Rating:

Word Count: 576

#### Document Preview

Midterm Practice 2 Physics 1B ------------------------------------ Name: ------------------------------------ ID number: ------------------------------------ Lecture (1 or 2): Section (A-F): ------------------------------------ 1. A nonconducting spherical shell, with an inner radius R1 = 4 cm and an outer radius R2 = 6 cm, has charge spread non-uniformly through its volume between its inner and outer surfaces....

Register Now

#### Unformatted Document Excerpt

Coursehero >> California >> UCLA >> PHYS 1B

Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
Midterm Practice 2 Physics 1B ------------------------------------ Name: ------------------------------------ ID number: ------------------------------------ Lecture (1 or 2): Section (A-F): ------------------------------------ 1. A nonconducting spherical shell, with an inner radius R1 = 4 cm and an outer radius R2 = 6 cm, has charge spread non-uniformly through its volume between its inner and outer surfaces. The volume charge density is the charge per unit volume measured in coulombs per cubic meter. For this shell, b (r) = , r where r is the distance to the center, and b = 3 10-6 C/m2 . What is the total net charge in the shell? Solution. R2 R1 Q= dV = 2 2 (r)(4r 2 ) dr = 2b R2 - R1 = 3.8 10-8 C 1 2. Two particles are fixed to an x axis: particle 1 of charge q1 = 2.1 10-8 C at x1 = 20 cm and particle 2 of charge q2 = -4q1 at x2 = 70 cm. At what coordinate on the axis is the net electric field produced by the particles equal to zero? Solution. The charges have opposite sign, so the field can only cancel to the left of both of them or to the right of both of them (not between the two). The total field is q -4q (x - x1 )2 +k =0 = 4 x = -30 cm (x - x1 )2 (x - x2 )2 (x - x2 )2 E=k 2 3. An electric dipole consisting of charges of magnitude Q =1.5 nC separated by l =6.2m is in an electric field of strength |E| = 1100 N/C. What are (a) the magnitude of the electric dipole moment and (b) the difference between the potential energies for the dipole orientations parallel and antiparallel to E? Solution. (a) The dipole moment is p = Ql = 9.3 10-15 Cm. (b) To flip the orientation of the dipole, one has to move one charge around other, the i.e. move it in the electric field by distance 2l. The change in the potential energy is U = Q E (2l) = 2.05 10-11 J (One could also show that, in general, the energy of the dipole p in the electric field E is U = p E. This leads to the same answer as above.) 3 4. A charge distribution that is spherically symmetric but not uniform produces an electric field of magnitude |E| = E(R) = bR4 , directed radially outward from the center of the sphere. Here R is the distance from the center, and b is some constant. What is the volume density of the charge distribution? Solution. Using the spherical symmetry, one can relate the flux through a spherical surface at distance R to the electric field at this surface: = 4R2 E(R) = 4bR6 According to Gauss' Law the same flux is related to the charge contained inside this surface: R = 4k dV = 4k 0 (r)(4r 2 )dr, where k = 1/(4 0 ). Now let us differentiate both sides of the equation R 4bR6 = 4k 0 (r)(4r 2 )dr with respect to R. This yields the final result (R) = 6b 0 R3 4 5. Two electrons are fixed at distance d = 2 cm apart. The charge of the electron is e = 1.6 10-19 C, and its mass is me = 9.1 10-31 kg. Another electron is shot from infinity and stops midway between the two. What is its initial speed? Solution. Assuming the potential is zero at infinity, the potential at the point between the two electrons is V = 2k 4ke e = , d/2 d The potential energy of the third electron at this point is U = eV = 4ke2 d Since the electron is at rest, its initial kinetic energy me v 2 /2 has been converted to the potential energy: mv 2 4ke2 = v= 2 d 8ke2 = 320 m/s me d 5
Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course Hero has millions of course specific materials providing students with the best way to expand their education.

Below is a small sample set of documents:

UCLA - PHYS - 1C
UCLA - PHYS - 1C
Solution set for the ph1c practice examNovember 17, 2007What's this? This is the solution set to the practice exam. Instructions Use these solutions as you see fit.1Problem 1Figure 1: The setup for problem 1 as seen in the bow's rest frame at
Arizona - NATS - 101
Dior, Gucci, Guess, Abercrombie, M.A.C. she had modeled for them all. She was gorgeous and she knew it. She was my girlfriend. I had dated her for 3 years now: a long time, I know. Yet recently, for some reason, confusion surrounded me. The more I tr
Arizona - NATS - 101
The original &quot;Food Guide Pyramid&quot; was created in 1992 by the USDA as a tool for healthy living. It included six basic food groups: Grains, Vegetables, Fruits, Oils, Milk, and Meat and Beans; and served as a more updated and in depth application of he
Arizona - ASTR - 204
TIME Magazine:Let There Be Light400,000 years after the Big Bang, the cosmos went black. Here's what happened next By MICHAEL D. LEMONICKRichard Ellis paces impatiently back and forth across a small room lined with computer terminals, trying to c
Virginia Tech - SOC - 1004
SOC 1004spring 2008Neal KingTuesday, February 5, 2008 New sects are often labeled &quot;cults&quot; by people who accuse them of brainwashing their recruits. Recruitment Groupthink and intense solidarity Personal accountability, high demands, a
Arizona - NATS - 101
Alcohol has been negatively perceived for a number of years, all the way from the Prohibition laws of the early 1900's, until todays concern for over-drinking college students. Yet according to some studies, the consumption of alcohol may in fact pos
Arizona - ASTR - 204
Sean Vanderwall Professor Dav Astronomy 201 December 5, 2006 Article Title: &quot;Let There Be Light&quot; Article Source &amp; Date: TIME Magazine, September 2006 Two astronomers, Ellis and his graduate assistant Stark got the chance of a life time to gaze into o
Virginia Tech - SOC - 1004
SOC 1004spring 2008Neal KingTuesday, February 19, 2008traditional wedding vows: Love, honor, and obey vs. cherish How did men come to treat women like property?Genetic inheritance accounts for of behavioral variation among huma
Arizona - ASTR - 204
Sean Vanderwall Cosmology Problem Set 5 November 2, 2006 Problems: HW 5: 20.38, 20.48, 21.35, 21.42. 20.38 a) Galaxy NGC 4594 is classified as a Sa galaxy because it is a very spherically based spiral galaxy with an extremely large bulge and has a d
Arizona - NATS - 101
Sean Vanderwall Cosmology Problem Set #4 October 19, 2006 Problems: 15.36, 18.6, 19.17, 19.39, 19.45 15.36 a) Sirius appears to be the brightest star in our sky because it has the lowest apparent magnitude. b) Regulus appears to be the faintest star
Arizona - ASTR - 204
Sean Vanderwall Cosmology Problem Set 6 November 16, 2006 Problems: 22.2, 22.11, 22.41, 22.42, 22.49. 22.2 A rotation curve is &quot;a graph that plots rotational (or orbital) velocity against distance from the center for any object or set of objects.&quot; T
Jeffrey Robertson Sean Vanderwall September 27, 2006 Assignment 2 1. The Roman Colloseum has a specific form and building type that are important to how it classified architecturally. The building type can be defined by the purpose or use of the buil
Arizona - NATS - 101
Sean Vanderwall Professor Dave Astronomy 201 November 16, 2006 Problem Set #7 Problems: 23.5, 23.8, 23.13, 23.46. 23.5 The four forces that operate in the universe today are gravity, electromagnetism, the strong force, and the weak force. We think t
Arizona - GEO - 33
Ryan Zukowski Geological Perspective 4/22/06 Extra Credit Tree-Ring1.) Can all wood be dated using tree-rings? Why or why not? Include 2 examples. Not all wood can be dated by using tree-rings because some trees grow internally, and therefore do no
Arizona - GEO - 33
Ryan Zukowski Earthquakes: Sudden release of elastic stored energy along faultsElastic Rebound Theory: EQ's result from the release of elastic stored energy by slipping on faults (sudden change in direction of plate motion) Fault- The fracture in th
Arizona - GEO - 33
PART 1 Throughout the Earth's history, Earthquakes have been one of the most feared and destructive phenomena nature has displayed. With that having been said, I would like to take some time and introduce you to what exactly an EQ is and the possible
Arizona - GEO - 33
Ryan Zukowski Geological Perspective 4/11/06 Extra Credit Peru Earthquake The Earth's solid surface is divided into over a dozen different plates that float on the mantle. As these plates move and shift relative to one another they release enormous a
UGA - CHEM - 1212
Electronic ArrangementBondsLone PairsShapeHybridAB2 AB3Linear/nonpolar20Linearsp sp2Trigonal Planar /nonpolar3 20 1Trigonal Planar BentAB4 AB3U AB2U2Tetrahedral/nonpolar40Tetrahedralsp3Tetrahedral/polar31
Virginia Tech - SOC - 1004
SOC 1004spring 2008Neal KingTuesday, February 26, 2008 Playboy magazine printed men's objection to lifelong marital contracts: Women and children cost a lot to support. The 20th century rise of consumer capitalism led to massive adver
Virginia Tech - SOC - 1004
SOC 1004spring 2008Neal KingTuesday, March 11, 2008Playboy magazine printed men's objection to lifelong marital contracts: Women and children cost a lot to support. Men realized that they could purchase most wifely services more cheap
E. Michigan - HRM - 479
Howard SchultzBeginning YearsGrew up in Brooklyn Poor Family Attended Northern Michigan University on a football scholarship Manager of U.S. operations for HammarplastHow Schultz got to Starbucks1981 he traveled to Seattle to check out t
Iowa State - LSCM - 360
Protective Packaging and Materials HandlingPackaging Id product and provide information Improve efficiency in handling and distribution Protect product Two types (reasons for) of packaging Consumer packaging Marketing managers primarily conce
Iowa State - LSCM - 360
Warehouse ManagementWarehouse Management Warehousing emphasizes storage of products. Distribution centers emphasize rapid movement of products through the facility. Throughput is the amount of product entering and leaving a facility in a given t
Iowa State - LSCM - 360
Inventory ManagementInventory Management Inventories are stocks of goods and materials that are maintained to satisfy normal demand patterns Inventory costs are important to consider Inventory turnover = cost of goods sold (or units per timeperi
Iowa State - LSCM - 360
Protective Packaging and Materials HandlingReview of Packaging Id product and provide information Improve efficiency in handling and distribution Protect product Consumer packaging how the package fits into the marketing mix. Industrial pack
Iowa State - LSCM - 360
Distribution Center, Warehouse, and Plant LocationNetwork Design (redesign) Considerations Changing Customer Service Requirements Customer's business changes New supply chain partners Shifting Locations of Customer and/or Supply Markets Geogr
Iowa State - LSCM - 360
Managing Human ResourcesAttractionHR Planning Job Analysis RecruitmentSelectionSelection PlacementDevelopmentSocialization/ Orientation Appraisal Training Career Develop.RetentionCompensation Turnover RetirementResource AcquisitionReso
Iowa State - MGMT - 370
What do Managers Actually Do?General Model: Managers engage in activities in order to attain goals.Specific Models: Vary in their definitions of what these activities are.Management Process Modellinking processes management functionsPlanning
Iowa State - MGMT - 370
Development of Management Thought Classical PerspectiveBehavioral Perspective Management Science PerspectiveIntegrative PerspectivesClassical PerspectiveAssumption: People are RationalAdam Scientific Administrative Bureaucracy Smith Managemen
Iowa State - MGMT - 370
Properties of Systems1. Closed versus Open Systems -Classical -Systems Theory -Behavioral -Management Science Implication: Importance of the External EnvironmentProperties.2. Natural versus Contrived SystemsImplication: Organizations can perpe
Iowa State - MGMT - 370
Properties of Management Fads1. 2. 3. 4. 5. 6. 7. They are relatively simple. They are falsely encouraging. One size fits all. Easy to cut and paste. They resonate with today's problems. They are novel but not necessarily radical. They are legitimiz
Iowa State - MGMT - 370
Levels of International Business ActivityDomestic International Multinational Global Business Business Corporation BusinessLow Level of International Activity HighTypes of International ActivityA. Market Entry Strategies1. Global Sourcing 2.
Iowa State - MGMT - 370
Types of Social ResponsibilityInternal: Employees Working Conditions Human Resource Utilization External: Community Affairs Consumer Affairs Environmental AffairsTraditional Viewpoint: The Case Against 1. One and only objective of business is to m
Iowa State - MGMT - 370
4 Views on Organizational GoalsClassical ManagementDecision Theory Behavioral ViewSystems Theory ViewClassical View of GoalsHierarchy of Objectives(Means-End Chain) Goal Displacement(Means-End Reversal)Effective Transportation Safety Co
Iowa State - MGMT - 370
Functions of Planning1. Adapt to Uncertainty and Change2. Focus Attention on Objectives 3. Increase Coordination 4. Facilitates Control3 PhasesStrategic PlanningWho does itTopImplem. Time level spanTotal Org./ SBU ~5 yrs.Types of plans
Iowa State - MGMT - 370
Types of Organizational StructuresFormal versus Informal Structures Bureaucratic versus Adaptive StructuresIn bureaucracies (Weber): Everyone knows what is expected of them (specific job descriptions) Everyone knows to whom they report (hierarchy
Iowa State - MGMT - 370
The Process of Controlling1. Set standards2. Measure actual performance and compare to standards3. Correct for any deviationsTypes of Control SystemsA. The Timing of the Control SystemB. The Level of the Control SystemC. The Control Mecha
Iowa State - MGMT - 370
Models of Human BehaviorSRSOROrganism (Individual) acts as an intervening variableWhy individual responses might vary?PerceptionsAttributions AttitudesPersonality ExperienceThe Process of PerceivingPicking up of Stimuli Stimulus
Iowa State - MGMT - 370
Definitions of LeadershipThe ability to persuade others to seek defined objectives enthusiasticallyPeople tend to follow those in whom they see a means of satisfying their own personal goals.Approaches to the Study of LeadershipPersonal Traits
Iowa State - MGMT - 370