ABSTRACT. In this experiment‚ we test factors which affect friction. We pulled a wood block across a surface to determine whetherthe surface area ofthe block orthe type ofsurface affectsfriction. We found that the surface area of the block did not change the coefficient of kinetic friction‚ while the types of materialsin contact were directly related to the coefficient of kinetic friction. INTRODUCTION Friction is a part of our everyday life. Nearly every movement we make involves friction
Premium Friction Force Classical mechanics
(2002). Strategic Human Resource Management and Organizational Performance in Singapore‚ Compensation and Benefits Review‚ Saranac Vol.34‚ No. 4 ROYAL DUTCH SHELL PLC ANNUAL REPORT AND FORM 20-F FOR THE YEAR ENDED DECEMBER 31‚ 2009 Shell annual report 2006 http://www.shell.com/static//investor/downloads/financial_information/reports/20f/2006_annual_report_20f_sec.pdf Performance management and appraisal‚ Cipd (2007) 2nd ed
Premium Human resource management Royal Dutch Shell
Chemistry Lab Report Water Hydration Introduction: A hydrated crystal or hydrated occurs when water becomes tightly attracted to a metal salt base on it’s polarity. The water molecules maintain integrity as molecules‚ however they are considered to be part of the formula of the hydrate. When the hydrate metal salt crystal is heated‚ the attractions to the water are broken by the heat energy and the water escape from the crystal. After heating the salt crystal is called as anhydrous‚ which
Premium Water Salt Sodium
Lab Report An enzyme is a protein that speeds up the rates of chemical reactions. They recognize‚ bind‚ and change specific reactants. They do not change so they can catalyze the same reaction again and again. Activation energy is the amount of energy needed in order to begin a chemical reaction. A Catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. Catalysts are substances or a substance that configures another substance
Premium Chemical reaction Chemistry Catalysis
Introduction: During this unknown lab report various test were performed to differentiate microbes from each other and to compare metabolic and biochemical process. The gram stain distinguishes between Gram positive and Gram negative bacteria based on the composition of the cell wall. The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring these cells red or violet. Gram positive bacteria stain violet due to the presence of a thick layer of peptidoglycan
Premium Bacteria Adenosine triphosphate
INTRODUCTION The measurement of fluid flow is very important in our daily life from measurements of blood-flow rates in human artery to the measurement of liquid oxygen in a rocket. In this experiment‚ students are to adapt to various ways to measure the flow of essentially incompressible fluids by using the flow measuring apparatus. Students will also be able to understand the application of Bernoulli’s equation in this experiment. The flow is measured by using a venture meter‚ an orifice meter
Premium Fluid dynamics Mass flow rate
ANALYTICAL AND ORGANIC CHEMISTRY LECTURER’S NAME : DR.RAPIDAH OTHMAN COD SUBJECT : NKB 10103 NAME : NUR NADIRAH BINTI BAHARUDEAN ID NUMBER : 55220114255 CHAPTER : ORGANIC CHEMISTRY CONTENTS 1‚4-BENZENEDICARBOXYLIC ACID Introduction The organic compound’s group that I’ve chosen in this assignment is 1‚4-benzenedicarboxylic acid. 1‚4-benzenedicarboxylic acid and also called as Terephthalic acid containing the carboxyl group and benzene group. Sometimes it simply referred to as a acid group
Premium Carboxylic acid Acetic acid
Aspirin or acetylsalicylate acid is a compound that is widely used in medicine. The use of aspirin in medicine began long before the active reagent was removed from its natural source. The first documented use of aspirin was found in the writings of Hippocrates‚ the so called father of medicine. Hippocrates prescribed that willow bark could be used to remedy a wide range of conditions such as pain‚ fever and inflammation. Scientists began to seek to extract the active compound from willow tree bark
Premium Aspirin
ANALYSIS OF ASPIRIN TABLETS The aim of this investigation is to determine the percentage by mass of aspirin aspirin present in different commercial preparations and to find out‚ which the best value is‚ using a neutralization reaction followed by a direct titration with NaOH. Chemicals Used: 100 ml of distilled water in a wash bottle 50 ml of 0.100 M NaOH 40 mL of 96% ethanol phenolphthalein as an indicator (3 drops per titration) 325 mg non buffered aspirin tablets Materials Used: One
Premium Titration Erlenmeyer flask
Sample Short Lab Report By Charles M Borener Jr April 24‚ 2009 Kinetic Friction Experiment #13 Joe Solution E00123456 Partner - Jane Answers PHY 221 Lab Instructor – Chuck Borener Thursday‚ 11 AM – 1 PM Lecture Instructor – Dr. Jacobs Abstract In this experiment‚ we test factors which effect friction. We pulled a wood block across a surface to determine whether the surface area of the block or the type of surface effects friction. We found that the surface area of the block did not change
Free Force Friction Mass