hypothesis of this lab was by using the density of alcohol we could calculate the density of a quartz samples. Controls and Variables: Independent variable: Volume of water and alcohol Dependent variable: The weight of the liquid or solid Controls: The volume of the water should be the same each trial Materials: Triple Beam Balance‚ Graduated cylinder‚ Beaker‚ Quartz‚ Distilled water‚ rubbing alcohol Procedure: 1. Find the mass of the empty graduated cylinder. 2. Fill then graduated
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The Relationship Involving Acceleration‚ Net Force‚ and Mass Giho Park Purpose The purpose of this lab investigation is to observe the relationship among the net force‚ mass‚ and acceleration of an object. Hypothesis/Prediction Part A If the net force increases with a constant mass‚ then the acceleration would increase‚ because the force would push the object to increase the velocity. Part B If the mass of the cart increases with a constant net force‚ then the acceleration would
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Purpose: The purpose of this lab is to identify the presence of cations and anions in four unknown solutions by identifying whether they are copper‚ silver‚ iron‚ or chloride ions which is done by adding sodium hydroxide‚ solid copper‚ silver nitrate‚ and potassium thiocyanate to the solutions and analyzing the chemical reactions. Introduction: Chemical change‚ unlike physical change is the change in the composition of a substance rather than simply its shape‚ size‚ or state (Marie‚ 2015). Signs
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structures. However‚ this means that once the structure of the enzyme is denatured and changed‚ the functions will most probably modify as well. In nature‚ this happens when the temperature and concentrations of different components are altered. In this lab experiment‚ we will be doing an in-depth research of exactly what happens to the enzymes‚ when it happens‚ and why it denatures the way it does. b. Hypothesis Materials and Methods a. Materials 50ml beaker of fresh potato catalase Reaction
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Stoichiometry lab By: James Stewart Purpose: To calculate mole ratios Introduction: There are two types of chemical analysis; qualitative analysis which is the identification of a substance present in a material‚ and qualitative analysis which measures the amount of the substance. In this lab‚ you will perform a quantitative analysis of a two-step reaction. Copper(II) oxide will be synthesized from a known mass of copper(II) sulfate pentahydrate. Using the relationship of the balanced equation
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Lab Report Problem: What method would consistently test the foam and ensure it has the correct density? Background: There are words that need to be understood before executing the experiment. The first thing you need to know is density. Density is a measure of mass per unit of volume. The reason for testing density of doors because doors must contain a density of 14.34lbs per ft3 of foam‚ or it will collapse if the density is too high. If the density is too low‚ it won’t allow for normal expansion
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Part 1A Analysis questions: 1. How many “chainobeads” was your enzyme able to make per minute in the 0 – 15 second interval? Our enzyme was able to make 6 chainobeads in the 0-15 interval. 2. How many “chainobeads” was your enzyme able to make per minute in the 60 – 120 second interval? Our enzyme was able to make 49 chainobeads in the 60-120 intervals. 3. Did your enzyme’s rate change over time? How does this compare to a real enzyme? The enzyme’s rate did change over time. This compares to a
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skills. “Training need analysis” is required for effective training program. Explain in detail‚ all the three factors of Thayer and McGhee model of identify training needs. Organizational analysis determines where training emphasis should be placed within the organization and is based on the objectives of an organization. Concerning what one should do in analysing an organization‚ McGhee and Thayer (1961) suggest four steps: 1. Stating the goals and objectives of an organization 2. Analysing the human
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Light Microscopy Lab Lab write-up 1 Parveen Rajper Biology 101 Principles of Biology 1 September 29‚ 2012 Introduction: The light microscope helps see the microscopic world that the naked eye cannot see. If there were no microscopes in the world‚ than it would be very difficult to understand the many particles that surround the living world. The purpose of this lab experiment is to become familiar with a microscope. It is hypothesized that it will be difficult
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Abby Goldschmidt Honors Biology 2° Mrs. Gempel September 3‚ 2015 Daphnia Lab Results Paper Abstract The goal of the study was to observe the effects of multiple chemicals on a Daphnia magna’s heart-rate compared to a control (pond water). The different chemicals were caffeine and alcohol. The heart-rate was the main variable in this experiment. The Daphnia’s heart-rate was observed for 15 seconds and then multiplied by 4 to show its heart-rate in one minute. This was repeated 4 times for each
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