______________________________________________________________________ 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
Premium Inflation Unemployment
Floating Balloon Purpose : To demonstrate the principle of buoyancy of warm air. Additional information : The density variation between warm and cool air can be used to explain why warm air possesses higher buoyancy. As hot air contain atoms and molecules with higher kinetic energy than cold air‚ it has a lower density and rises up while the colder air goes downwards
Free Fundamental physics concepts Water Density
During an experiment‚ there was a glass eye dropper placed into a bottle filled to the brim with water with the cap closed. The glass eye dropper floated in the bottle when the bottle was left alone. When the bottle was squeezed‚ however‚ the glass dropper sunk to the bottom. When the pressure was released from the bottle‚ the dropper floated back to the top of the bottle. The dropper floated at the top of the bottle when no pressure was applied‚ because the air inside the dropper was less dense
Premium Fundamental physics concepts Density Newton's laws of motion
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:
Premium Force Classical mechanics Energy
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
Premium Electric charge Force Electromagnetism
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
Premium Fundamental physics concepts Inertia Classical mechanics
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
Premium Electric charge Electrostatics Fundamental physics concepts
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)
Premium Electric charge Force Potential energy
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
Premium Marketing
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
Premium Scientific method Research Problem solving