A hard rubber ball is dropped from rest. It falls to the concrete floor and bounces back up ALMOST to its initial height. A motion detector is mounted on the ceiling directly above the ball‚ facing down. So‚ the positive direction -- the away-from-the-detector direction -- is downward. Draw the position‚ velocity‚ and acceleration graphs. Since moving downward is a positive direction‚ is the velocity positive when the ball falls‚ 0 when it hits the ground‚ and then negative when it moves up?
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Concordia University Executive Summary Problem/Goal Definition The Baron’s goal is to determine which farmers’ wheat production was more efficient with respect to the resources provided to them. Quantitative Analysis • Bushels of wheat are used as the common denomination in this case. • Oxen and plow are depreciable assets. According to Exhibit C and Exhibit D‚ both farmers’ oxen are depreciated using the straight-line method. Frederick can depreciate his plow‚ but Ivan cannot
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Introduction: Systolic blood pressure‚ the highest pressure in the cardiac cycle‚ measures the pressure in the arteries as the left ventricle contracts. Diastolic blood pressure‚ the lowest pressure in the cardiac cycle‚ measures the pressure in the arteries as the ventricles relax and refill with blood just before the next ventricular contraction. We measure blood pressure using a sphygmomanometer and a stethoscope. To measure the systolic pressure‚ place the blood pressure cuff on the upper arm
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changes in temperature. The changes in temperature were to be used to find the amount of heat released or absorbed. EXPERIMENTAL Reference """""""""""your website with your information""""""" RESULTS Calculation Calculation for determination of q: q = ms∆T Hess’s Law-type calculation ΔH = ΔHproducts – ΔHreactants J = g x [ J / ( g x ° C ) ] x ° C Calculation for Heat Change q=60g(160g*4.4c) =(60g*4.18J)/4.4j =1104.56 Joules CLASS TABLE part I
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Determination of Iron by Reaction with Permanganate-A Redox Titration Purpose: The purpose of this experiment was to find the percentage of iron in an unknown iron oxide sample which could be determined through titration with a standard solution of potassium permanganate. Success in this analysis requires careful preparation and attention to detail. Performing this experiment also provides practice at titrations. The overall reaction is: 8H+(aq) + MnO4-(aq) + 5e- Mn2+(aq) + 4H2O Theory:
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Today science technologies are beyond incredible and can enhance our level of understanding about the past‚ present and future Earth. It allows us to see beyond our history and where and how we first came to be‚ tracking the little but significant details which allows science to trace our own ancestral journey out of Africa. The National Geographic’s Genographic Project aims to map historical human migration patterns by collecting and analysing DNA samples from hundreds of thousands of people from
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SPECTROPHOTOMETRIC DETERMINATION OF THE EQUILIBRIUM CONSTANT OF A REACTION Methodology The following stock solutions were prepared: 1.0 M HCl‚ 0.1 M HCl‚ 0.1 M KSCN‚ 0.002 M KSCN (in 0.1 M HCl)‚ 0.2 M FeCl3 (in 0.1 M HCl)‚ and 0.002 M FeCl3(in 0.1 M HCl). Using the prepared stock solutions‚ the standard (Table 1) and Unknown (Table 2) solutions were prepared. Table 2. Preparation of Standard Solutions 0.10 M KSCN 0.002 M FeCl3 0.1 M HCl Blank 2.0 ml 0.0 ml 8 ml S1 2.0 ml 0.1 ml 7
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SPECTROPHOTOMETRIC DETERMINATION OF THE EQUILIBRIUM CONSTANT OF A REACTION M. L. SANGA CHEMICAL ENGINEERING‚ COLLEGE OF ENGINEERING UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY‚ PHILIPPINES DATE PERFORMED: JANUARY 15‚ 2014 INSTRUCTOR’S NAME: MOISES JEROME GARRERO ______________________________________________________________________________________________________________________________ ABSTRACT The experiment aimed to determine the equilibrium constant Keq of the formation
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Jeremy Li Wai Long Lam Experiment 9: Rate Law Determination of the Crystal Violet Reaction Goals: Under stand 1st‚ 2nd ‚ and 3rd order chemical reactions‚ learn graphing options available on LogerPro Purpose: Determine the reaction order with respect to crystal violet for the reaction between crystal violet and sodium hydroxide. Introduction: The rate expression for this reaction is of the form: rate = K(CV+)M(OH-)N Where k = re constant‚ m is the order of the reaction with respect to the
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Experiment 3: Cryoscopic Determination of Molecular Weight Aim: The primary objective of the experiment is to calculate the total molecular mass of the compound benzoic acid in a predetermined amount of cyclohexane. Introduction: One of the key concepts in this experiment is the term freezing point depression. The definition of this phrase is that when a solute is dissolved into a solvent‚ their collective boiling point will be less than that of the original boiling point of the solvent. This incidentally
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