______________________________________________________________________ First Name: ______________________________________________________________________ Student Number: __________________________________________________________________ UNIVERSITY OF SYDNEY ECON1002 INTRODUCTORY MACROECONOMICS Mid-semester Exam Semester One‚ 2012 Instructions: ________________________________________________________________________________ Time allowed: 60 minutes (plus 5 minutes reading time). The exam consists of 2 sections. Section
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Energy: the ability to do work. Work= force x displacement. Power=energy/time Power is measured in watts or horsepower. Joules/sec=watts 1hp=746w=1kw Basal metabolic rate 2000kcal/day= 100w Batteries store energy in chemical form. They release energy by pumping electrons’ through wires from the minus pole to the plus pole. Devices inbetween convert this energy to another form‚ Efficieny- e.motor=85%‚ combustion= 20% Hydrogen is not a source of energy but a means of transportation Types of energy:
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Name _____John Munro___________________________ Electric Fields – Lab 16 Go to http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields and click on Run Now. Part 1: What is an equipotential line and how is this simulation related to work and energy? 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3) In the lower left of the screen is a meter for indicating electric potential‚ in volts‚ created by the charge that you
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Experiment 9: Maxwell’s Wheel Introduction: The second lab performed on 2/1/12 involved two investigations concerning Maxwell’s wheel. Maxwell’s wheel is an apparatus that consists of a large disk with a long axle. The disk then bound to a support hanging from above with strings attached to each end of the axle. Maxwell’s wheel is considered to be an important apparatus to investigate physical phenomenon’s because it its ability to combine straight line motion and rotation of a rigid body
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Chapter 24 Gauss’s Law Multiple Choice 1. Two charges of 15 pC and –40 pC are inside a cube with sides that are of 0.40-m length. Determine the net electric flux through the surface of the cube. a. +2.8 N ( m2/C b. –1.1 N ( m2/C c. +1.1 N ( m2/C d. –2.8 N ( m2/C e. –0.47 N ( m2/C 2. The total electric flux through a closed cylindrical (length = 1.2 m‚ diameter = 0.20 m) surface is equal to –5.0 N ( m2/C. Determine the net charge within the cylinder
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Name Melanie Mickens_______________________ Equipotential Go to http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields and click on Run Now. Complete Part 1 for chapter 18 and part 2 and 3 for chapter 19. Part 1: What is an equipotential line and how is this simulation related to work and energy? They are like contour lines on a map which trace lines of equal altitude. 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3)
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INTRODUCTORY MARKETING BIK 0012 FIRST SIT ASSIGNMENT 2009/10 VIKKI PADGETT Word Count: 2‚423 (excluding references) Brief: The concept of marketing has been around for a long time. Discuss how marketing has developed over time and the possible impact (if any)‚ marketing may have on society. Use examples known to you‚ to support your answer. When looking at the history of marketing‚ firstly the definition of marketing must be stated
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Test Data for Introductory Physics Courses (A Research Journal Critique) In partial fulfillment of the requirements in Physics 501: Theoretical Mechanics during the First Semester of the school year 2008 – 2009 Maria Jocelyn T. Claridad Master of Arts in Science Education with Specialization in Physics Prof. Antriman V. Orleans October‚ 2008 Interactive-Engagement vs. Traditional Methods: A Six Thousand-Student Survey of Mechanics Test Data for Introductory Physics Courses Richard
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Classical Linear Regression Models and Relaxing their Assumptions Seid Nuru seidnali@yahoo.com August 2012 > The Classical Linear Regression Models Introduction The Simple Regression Model The Multiple Linear Regression Models Violations of the Assumptions of CLRMs Definition • Econometrics is the application of statistical‚ and mathematical techniques to the analysis of economic data with a purpose of verifying or refuting economic theories. Theory Mathematical Model Econometric
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Sucrose is a disaccharide formed from D-glucose and D-fructose. The glycosidic linkage is between C1 of glucose and the C2 of fructose. 1H NMR of Sucrose: Mass Spectrum of Sucrose: 13C NMR spectra of sucrose: 3. Why is it difficult to isolate sugars? For simple sugars‚ they are small molecules and they behave similar properties that make them hard to separate. Besides‚ sugars are most electrically neutral. The separation of electrically neutral sugars is a relatively difficult and
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