Introduction Wrong or inaccurate measurements can lead to wrong decisions‚ which can have serious consequences‚ costing money and even lives. The human and financial consequences of wrong decisions based on poor measurement being taken in matters as important as environmental change and pollution are almost incalculable. It is important therefore to have reliable and accurate measurements which are agreed and accepted by the relevant authorities worldwide. Metrologists are therefore continuously
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In The Laboratory‚ the courtesan chooses poison as her murder weapon. Poison is often the weapon of choice for female killers. It requires little or no physical strength to administer‚ and can be done secretly. It also leaves little evidence thus making it difficult to detect the culprit. We believe the act of murder is because of another woman that her lover is with and she feels physically inferior to her rival. We know this because she starts saying ‘What a drop! She’s not little‚ no minion like
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uncertainties that are obtained during measurements. For an experiment to be successful‚ especially those that involve measurements‚ the number of significant figures must be known. Significant figures are the digits required to express a measured quantity and thus reflect the accuracy of the measurement. Uncertainty is defined as the smallest increment that can be measured and is defined by the instrument used. An error is defined as any deviation from the standard value. Errors could either
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Service Quality— From Definition to Measurement Introduction In recent years‚ more and more companies start to concentrate on the quality of their products. The products could be tangible as physical goods‚ or intangible like the service. This article is more about the service product. Since the service has no tangible form‚ the service quality is difficult to measure. Businesses want to get the information about the customers’ perceptions of the service they provided. Then they need to measure
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starch it changes to a black liquid. | G | KI and Pb(NO3)2 | It changes to a strong yellow liquid which seems to be more heavy. | H | NaOH and phenolphthalein | It gets a strong purple color | I | HCI and phenolphthalein | The change of the liquid from no-color to white shows that´s an acid‚ if it gets combines with a base like the number h the color became strong. | J | NaOH and AgNO3 | It creates brown crystals and all the liquid gets brown. | K | AgNO3 and NH3 | It has no changes‚ when the
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Math Practice Lab Pre-Lab Questions: 1. The rules concerning handling significant figures are as follows: When dividing/multiplying The answer has no more significant digits than the number with the fewest significant digits (the least precise figure). Round off after calculations have been performed. When adding/subtracting Answer has no more places than the addend‚ minuend‚ or subtrahend with the fewest number of decimal places. Significant figures are irrelevant when adding/subtracting
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Analytical measurement: measurement uncertainty and statistics Ricardo Bettencourt da Silva‚ Ewa Bulska‚ Beata Godlewska-Żyłkiewicz‚ Martina Hedrich‚ Nineta Majcen‚ Bertil Magnusson‚ Snježana Marinčić‚ Ioannis Papadakis‚ Marina Patriarca‚ Emilia Vassileva‚ Philip Taylor Editors: Nineta Majcen‚ Vaidotas Gegevičius Joint Research Centre Analytical measurement: measurement uncertainty and statistics Editors: Nineta Majcen Vaidotas Gegevičius Authors: Ricardo Bettencourt da
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Molecular Spectroscopy - Structural Determination Organic Chemistry II CHEM 2425 Manrique October 30‚ 2012 Alex Wolf Introduction For the purposes of this lab‚ the chemical formula will be given‚ and the degrees of unsaturation can be calculate from the formula (2C+2)-(H+Hal-N)/2. The degrees of unsaturation will give clues as to the structure. A double bond‚ as well as a ring will have one degree of unsaturation each‚ while a double bond will have two. All of these added will give a total of
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Scientific Method Portland Community College Staff* Version 42-0207-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this
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Title: Physical and Chemical Properties Purpose: The purpose of this experiment is to investigate the physical and chemical properties of pure chemical substances by subjecting them to various environmental extremes. Procedure: Filled each test tube with substances provided and subjected them to various conditions. These conditions included‚ heat‚ cold water‚ hot water‚ acid and basic additions and tested on litmus paper. The reactions were observed and documented at each step. Data tables:
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