# 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.

1 Page

### lec 2 prob a solution

Course: ME 2124, Spring 2011
School: Virginia Tech
Rating:

#### Document Preview

Sorry, a summary is not available for this document. Register and Upgrade to Premier to view the entire document.

Register Now

#### Unformatted Document Excerpt

Coursehero >> Virginia >> Virginia Tech >> ME 2124

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.
There is no excerpt for this document.
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:

Virginia Tech - ME - 2124
2. Systems, Interactions, Properties, States, ProcessesSystem Bounded region of interest defined by us for our convenience. Specification of the boundary is crucial and must be consistent throughout a process. Choose system boundaries according to: 1) Kn
Virginia Tech - ME - 2124
Phases, Ideal Gases, p-v-T DiagramsPhase - Matter that is homogeneous in chemical composition and physical structure. Examples:Pure Substance - Matter that is uniform and invariable in chemical composition. Is air a pure substance?Simple Compressible S
Virginia Tech - ME - 2124
Work Interactions, Heat InteractionsMechanics definition of work:r r W = F dss2 s1Examples: 1. Constant force field, e.g. earth's gravityF = mg2. A springW= W= W=F = kx3. Friction (dry)F = mgThermodynamic definition of Work Interaction: A work
Virginia Tech - ME - 2124
Lect 51st Law of Thermodynamics, Energy, CyclesKinetic Energy - The energy of mechanical motionKE = 1 mV 22KE = KE2 - KE1 = 1 m V22 - V12 2()Potential Energy &quot;Stored&quot; mechanical energy e.g. gravitational potential energyPE = mgzPE = PE 2 - PE1 =
Virginia Tech - ME - 2124
Lec 6Internal Energy, Enthalpy, h and u and Specific Heats cv and cpIn many applications the quantity, Internal Energy U added to the product PV appears so often it has been given its own symbol H that is called enthalpy. H = U + pV H on a unit mass bas
Virginia Tech - ME - 2124
Lec 7Control Volumes and Mass BalancesControl Volume A prescribed, bounded region under study. The boundary may be fixed or may move and deform. Mass may cross the control volume boundary.Mass Rate Balance Conservation of mass requiresdm cv &amp; &amp; = mi -
Virginia Tech - ME - 2124
Lec 8Mass Balances, Energy Balances and Applications to Conversion Devices.Review of mass balanceConservation of energy for a control volumeEnergy balance can be expressed in terms of beginning and end states or in terms of flow ratesWork for a contr
Virginia Tech - ME - 2124
Lec 9Mass and Energy Balances for Devices Cont.Turbines - Devices which produce power as a result of a gas or liquid passing through a set of vanes attached to a freely rotating shaft. Ex. Hydropower Steam and gas turbines V12 - V22 &amp; + W + m (h - h )
Virginia Tech - ME - 2124
lec 10Introduction to Fluid MechanicsFluid Mechanics The discipline within applied mechanics that is concerned with the behavior of liquids and gases at rest or in motion. Topics: e.g. fluid pressure, viscosity, fluid flow, turbulence Fluid A substance
Virginia Tech - ME - 2124
Virginia Tech - ME - 2124
Heat Transfer Homework Answers ME 2124 Fall 2011Problem Answer(s)&amp; a) dT/dx = -280 K/m, Q = 14,000 W/m2 &amp; b) dT/dx = 80 K/m, Q = -4,000 W/m2HT1&amp; c) T2 = 110C, Q = -8,000 W/m2 &amp; d) T1 = 60C, Q = 4,000 W/m2 &amp; e) T1 = -20C, Q = -10,000 W/m2HT2 3.5 3.7 3
Virginia Tech - ME - 2124
Fluid Mechanics Homework Answers ME 2124 Fall 2011Problem FL1 Answer(s) 1000 N/m2 (a) diagram (b) F = mgsin (c) sketch (d) F = Av/h (e) v = mghsin / A (f) 31.7 cm/s, lower (a) 265 kPa (b) 196.2 Pa 3.43104 lbfFL2FL3 1.67 1.70(a)2Ri l = Ro - Ri(a) 0.60
Virginia Tech - ME - 2124
Thermodynamics Homework Answers ME 2124 Fall 2011Problem TD1 TD2 1.7 1.16 TD3 TD4 TD5 TD6 1.42 TD7 TD8 TD9 TD10 3.105 TD11 TD12 2.30 2.33 2.42 TD13 TD14 TD15 2.68 2.72 Answer(s) 34.4 furlongs/fortnight 4.21108 yen/day (a) 30.9 ft/s2; (b) 150 lbf - 25.8 f
Virginia Tech - ME - 2124
ME 2124 Introduction to Thermal Fluid Engineering Homework Problems Fluid Mechanics Fall 2011 1. Two plates are separated by an oil film 0.010 mm thick. Oil viscosity is oil = 0.1 N-sec/m2. The upper plate is moving at 100 mm/s. The oil flow between the p
Virginia Tech - ME - 2124
ME 2124 Introduction to Thermal-Fluid Engineering Homework Problems Heat Transfer (HT) Fall 2011 1. Consider steady-state conditions for one-dimensional conduction in the system below having a thermal conductivity k = 50 W/mK and a thickness L = 0.25 m, w
Virginia Tech - ME - 2124
ME 2124 Introduction to Thermal-Fluid Engineering Homework Problems - Thermodynamics (TD) - Fall 2011 1. An archaeologist has found a hieroglyphic inscription describing how a team of 4,000 Egyptians could move a 20-ton granite block a distance of 1.5 cub
Virginia Tech - ME - 3514
ME 3514 - System DynamicsPolicy Sheet Fall Semester, 2011CRN 94332 - MWF 8:00 AM 8:50 AM Randolph Hall 221Credit:3 credit hoursPrerequisites: MATH 2214, ESM 2304: Dynamics Of Particles And Rigid Bodies - Vector treatment of the kinematics and kinetic
Virginia Tech - ME - 3514
Virginia Tech - ME - 3514
ME3514Laplace TransformTopics Laplace transform Inverse Laplace Transform p Laplace Transform Table Solving Differential Equations Using Laplace Transform Final Value Theorem Partial Fraction Expansion (by hand and using MATLAB)M. Remillieux1ME3514L
Virginia Tech - ME - 3514
ME3514Partial Fraction ExpansionTime Domain Laplace Domain Step # 1: Take Algebraic equationSolving ODE usingDifferential equation with initial conditions We want to solve for x(t)Many times we can not find the -1 [X(s)] in the Laplace table Then, we
Virginia Tech - ME - 3514
ME3514Mechanical SystemsOutline Units Mechanical Elements Derive equations of motion (EOM) Newton's law Energy method Compute Natural Frequency Compute responseM. Remillieux1ME3514Units SI Britishsec in (or ft) lb lb/in lb.s/in lb.s2/in lb.in lb.in
Virginia Tech - ME - 3514
ME3514 Complex Numbers:Complex NumbersImaginary Partz a ibReal P R l Part Imaginary Unit, I i U iti 1Graphic Representation:Complex Plane b Imaginary Axis Complex Number zVector Representation of z a Real AxisComplex numbers also behaves as a vec
Virginia Tech - ME - 3514
ME 3514 SYSTEM DYNAMICSInstructor Ricardo A Burdisso A. 153 Durham Hall 231-7355 rburdiss@vt.eduIntroduction SYSTEMS: combination of components acting together to perform a task. Component is a single unit of a system. D Dynamic vs static system i t ti
Virginia Tech - ME - 3514
ME3514Partial Fraction Expansion Using MATLABIMPORTANT NOTE: MATLAB and book use different notation! OGATA Expansion FormX ( s) r r r B( s) 1 2 . n A( s) s p1 s p2 s pn X ( s) r r r B( s) 1 2 . n A( s) s p1 s p2 s pnMATLABPoles p1 , p2 ,., pnp1 , p
Virginia Tech - ME - 3514
ME3514Topics Transfer Function T f F ti Block Diagram Transient Response Analysis using TF with MATLAB p y g Unit Impulse (Delta) Function Impulse Delta f function Momentum Relationship between momentum and impulse Laplace transform of an impulse Exampl
Virginia Tech - ME - 3514
ME3514Topics Transfer Function T f F ti Block Diagram Transient Response Analysis using TF with MATLAB p y g Unit Impulse (Delta) Function Impulse Delta f function Momentum Relationship between momentum and impulse Laplace transform of an impulse Exampl
Virginia Tech - ME - 3514
ME3514State-Space To model Dynamic SystemsState-Space State Space Modeling: is a method to find the response of dynamic systems that can be easily implemented on the computer, e.g. MATLAB. State-Space equations: consists of two type of equations, e.g. &quot;
Virginia Tech - ME - 3514
ME 3514Transfer-Function ApproachObjective Use Transfer Function and Block Diagram to model and analyze mechanical systems. Explore transient response of systems using transfer function with application of MATLABTopics R. BurdissoTransfer Function Bl
BYU - BIO - 100
Activities for Week 1 (Jan 5,7) &amp; Week 2 (Jan. 10, 12, 14) Ri T Tii P h i (Sllb pg2,\Review Test Training Paragraph assignment (Syllabus bottom). Question to answer: How can the scientific method be used to understand
UCF - ECO - 6416
Subjective Assessment of Several Estimates Based on Relative Precision In many cases, we may wish to compare several estimates of the same parameter. The simplest approach is to measure the closeness among the estimates in an attempt to determine that at
UCF - ECO - 6416
Sample Size Determination At the planning stage of a statistical investigation, the question of sample size (n) is critical. This is an important question therefore it should not be taken lightly. To take a larger sample than is needed to achieve the desi
UCF - ECO - 6416
Revising the Expected Value and the Variance Averaging Variances: What is the mean variance of k variances without regard to differences in their sample sizes? The answer is simply: Average of Variances = [Si2] / k However, what is the variance of all k g
UCF - ECO - 6416
Hypothesis Testing: Rejecting a Claim To perform a hypothesis test, one must be very specific about the test one wishes to perform. The null hypothesis must be clearly stated, and the data must be collected in a repeatable manner. If there is any subjecti
UCF - ECO - 6416
Managing the Producer's or the Consumer's Risk The logic behind a statistical test of hypothesis is similar to the following logic. Draw two lines on a paper and determine whether they are of different lengths. You compare them and say, &quot;Well, certainly t
UCF - ECO - 6416
What Is a Standard Error? For statistical inference, namely statistical testing and estimation, one needs to estimate the population's parameter(s). Estimation involves the determination, with a possible error due to sampling, of the unknown value of a po
Loyalist College - CONTINUEIN - HLTH 8058
QUALITATIVE RESEARCH Qualitative research is a type of scientific research. In general terms, scientific research consists of an investigation that: seeks answers to a question systematically uses a predefined set of procedures to answer the question coll
Mt. Hood Community College - CIS - 120
Chapter 11 Homework Quiz1.Question 003Which of the following is NOT a problem associated with data inconsistency in a database?Student Response A.Value Correct AnswerFeedbackInconsistent data formatB.Necessity of updating all the lists containing
UConn - PHAR - IMMUNO
DNA AND FORENSICS *DNA profiles what are they? How are they used? Analyzing DNA (two methods)s, kinds of DNA Specific uses then and now (crimes, genealogy, commerce) DNA Profiling: used to ID suspects from hair, blood, semen, other biological materials fo
Virginia Tech - BIOL - 1105
Chapter 7: Harvesting the fixed energy of photosynthesis to produce cellular energyRespiration Organisms can be classified based on how they obtain energy: Autotrophs Able to produce their own organic molecules through photosynthesis Heterotrophs Liv
Virginia Tech - HTM - 2454
HTM 2454: Careers in TourismCareers in Tourism Video WTTC Job Forecast Statistics The Importance of Internships Careers in Tourism Some Additional Ideas The Great DebateCareers in Tourism VideoWTTC Job Forecast Statistics Tourism contributes to:
Virginia Tech - HNFE - 2824
Chapter 1: Putting Together A Sports Medicine Team and Defining Their Roles 2005 The McGrawHill Companies, Inc. All rights reserved.What Is Sports Medicine ? Sports medicine refers to a broad field of medical practices related to physical activity and
Virginia Tech - HNFE - 2824
CHAPTER 2: ORGANIZING AND ADMINISTERING AN ATHLETIC HEALTH CARE PROGRAMFacility Design Design will vary drastically based on number of athletes, teams, and various needs of the program Size Varies between settings Existing space or newly designed Out
Virginia Tech - HNFE - 2824
Chapter 3: Legal Liability and Insurance 2005 The McGrawHill Companies, Inc. All rights reserved.Legal Concerns of the Coach and Athletic Trainer Negligence suits involving coaches, athletic trainers, school officials and physicians have increased in f
Virginia Tech - HNFE - 2824
The 1st testicular guard &quot;cup&quot; was used in hockey in 1874. The first helmet was not used in hockey until 1974!Chapter 6Safety Standards for Sports Equipment and Facilities Safety Standard Concerns Who should set the standards? Mass production of equip
Virginia Tech - HNFE - 2824
Emergency Situations and Injury AssessmentChapter 7Emergency Preparation Basic knowledge of trauma care is critical You could be the one who is responsible for saving someone's life Emergency situations may arise at anytime during athletic events Quic
Virginia Tech - HNFE - 2824
Keith Doolan and Mike Goforth Do no further harm Splint it as you find it Survey the scene Stop major bleeding first Protect yourself Document Professionalism Consent Do not PANIC Refer! Rest Ice Compression Elevation
Virginia Tech - HD - 1004
9/13/11 The Newborn Infant Preterm Infants: Too Soon, Too Small Preterm infants Infants who are born prior to 38 weeks after conception (also known as premature infants)&quot; Low-birthweight infants Infants who weigh less than 2,500 grams (around 5 1/2 po
Virginia Tech - HD - 1004
9/16/11 Associa,ve Learning Classical condi+oning takes advantage of reflexive responding to s,muli. Classical condi,oning may be defined as a procedure in which a neutral s,mulus - a s,mulus that ini,ally does not elicit a par,cular reflexive response
Virginia Tech - HD - 1004
The Scien)fic Method and Research Theories and Hypotheses: Posing Developmental Questions ! The scientific method is the process of posing and answering questions using careful, controlled techniques that include systematic, orderly observation and the c
Virginia Tech - HD - 1004
9/16/11 Physical Growth: The Rapid Advances of Infancy Physical Development in Infancy Infants grow at a rapid pace over the first 2 years of their lives.&quot; By the age of 5 months, the average infants birthweight has doubled to around 15 pounds. By th
Virginia Tech - HD - 1004
9/13/11 Start of Life: Gene.cs, Prenatal Development, and Birth Key Ques,ons What is our basic genetic endowment, and how can human development go off track?&quot; How do the environment and genetics work together to determine human characteristics?&quot; Which
Virginia Tech - HNFE - 1004
14:05 EXAM 4 Critical violations: potentially harmful food sanitation practices that can lead to illness of consumers Phases of Human Development Prior to implantation Nourishment fluids and lining of uterus 1st 2 weeks Embryo 2 8 weeks implantation and p
Virginia Tech - HNFE - 1004
HNFE 1004Is protein deficiency a problem? Poverty 60% of world &lt;\$2000/year U.S 11 million kids under ager 12 hunger/poverty US elderly on a fixed income Marasmus (PEM) Protein/energy malnutrition Develops slowly Dry skin Muscle wasting Low body temp Leth
Virginia Tech - HNFE - 1004
HNFE 1004 Note Taking Outline and Study GuidePrint this out or use with your laptop (giving yourself plenty of space between items for taking notes) Read text before class and use outline to highlight key concepts from your book and in lecture . See syll
Virginia Tech - PSYC - 2004
LIFESPAN DEVELOPMENTLECTURE OUTLINEDEVELOPMENTAL VS. CHILD PSYCHOLOGY RESEARCH TECHNIQUES CROSSSECTIONAL LONGITUDINAL CROSSSEQUENTIAL MAJOR METATHEORIES THE NATURENURTURE ISSUE EMPIRICIST (NURTURE) RATIONALIST (NATURE) EARLY DEVELOPMENTAL THEORIES FREUD
St. Mary NE - ENG - 1201
TESTS100 TOEIC Preparation TestsIndex . Advanced Level 1. Bearing Information . 2. Cinemas . 3. Cliches . 4. Mistaken Identity . 5. Speaking: At the Station . 6. Speaking: At the Supermarket . 7. Speaking: At the Theatre . 8. Speaking: The Broadcast . 9
St. Mary NE - ENG - 1201
teststoeic342 TOEIC Vocabulary Tests3420 Meanings by WordIndex . Test 1/words: miserably, autograph, card, doctor, duplicate, sound . Test 2/words: rubber, reticent, thorough, emergency, dependent, stock . Test 3/words: attorney, engineer, corruption,
St. Mary NE - ENG - 1201
teststoeic342 TOEIC Vocabulary Tests3420 Words by MeaningIndex . Test 1 . Test 2 . Test 3 . Test 4 . Test 5 . Test 6 . Test 7 . Test 8 . Test 9 . Test 10
St. Mary NE - ENG - 1201
Flashcards3420 TOEIC Wordsabbr. used at the end of the list of subjects to be discussed at a meeting or conferenceabbr. morning; time before noon; hours between midnight and noonv. to comply; to obey; to conform; to stay; to toleraten. shortened form
St. Mary NE - ENG - 1201