'Absolute uncertainty' diaporamas de présentation

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Homework

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Chapters 3 Uncertainty

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Chapter 11

Chapter 11. Measurement & Data Processing IB Chemistry Tam Fall 2010. Standards. 11.1.1 Describe and give examples of random uncertainties and systematic errors. 11.1.2 Distinguish between precision and accuracy. 11.1.3 Describe how the effects of random uncertainties may be reduced.

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Assigning and Propagating Uncertainties

Assigning and Propagating Uncertainties. Assigning Uncertainties. In the laboratory experiments you will be performing you will have to make measurements; the results of these measurements will always be uncertain to some extent

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Topic 11: Measurement and Data Processing IB Core Objective

Topic 11: Measurement and Data Processing IB Core Objective 11.1.2 Distinguish between precision and accuracy . Distinguish : Give the differences between two or more different items. (Obj. 2). 11.1.2 Distinguish between precision and accuracy.

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Measurements and Uncertainties

Measurements and Uncertainties. Uncertainties and Errors Resolution This is the smallest change in a quantity that can be measured by an instrument. E.g. What is the resolution of a. A 30cm ruler b. An analogue wristwatch c. A thermometer We prefer high resolution instruments:

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CHEMISTRY 59-320 ANALYTICAL CHEMISTRY Fall - 2010

CHEMISTRY 59-320 ANALYTICAL CHEMISTRY Fall - 2010. Lecture 4. Chapter 3 Experimental error. 3.1 Significant Figures The minimum number of digits needed to write a given value in scientific notation without loss of accuracy. A Review of Significant Figures

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Uncertainty in Measurement

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Independent & Dependent Variable

Independent & Dependent Variable. In order to create a valid experiment, the experimenter can only change ONE variable at a time The variable that is being changed by the experimenter is called the ______________________ variable .

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Measurement

Measurement. Uncertainty. A student measures a length of 50.0 cm with a meterstick divided with marks at each millimeter. The uncertainty is about A) 1 cm. B) 5 mm. C) 0.5 %. D) 0.2 %. E) 0.02. How to Measure. Measuring instruments are common. Ruler Clock Speedometer Thermometer

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DATE: 10/ 15/ 15 TOPIC/ Objective :

Unit 1: Chemistry Fundamentals: Matter & Measurements. 1.6. AGENDA. Do Now. Introduction. Mini-Lesson. Summary. Work Period. Exit Slip. DATE: 10/ 15/ 15 TOPIC/ Objective : I will calculate uncertainty using +/- notation and percent error. Essential question :

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Errors and Uncertainties

Errors and Uncertainties. I n M easurements and in Calculations. Types of Experimental Errors:. Random Errors : A result of variations in the performance of the instrument and/or the operator Do NOT consistently occur throughout a lab Some examples :

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Errors and Uncertainty

Errors and Uncertainty.

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Errors and Uncertainty

Errors and Uncertainty.

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Numerical measurements

absolute uncertainty : true value +/- (range of values /2). Numerical measurements. a lways involves. uncertainty. which is expressed as. w hich is reflected by. relative uncertainty : average range/true value. Significant Figures. a djusted by. Rounding off.

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Notes on Uncertainty Analysis

Notes on Uncertainty Analysis. a.k.a. Error Analysis. Uncertainty. Any measured or calculated value has some level of uncertainty Not due to mistakes Unavoidable due to the nature of the experiment Consider measuring a grape Uncertainties usually reported to 1 significant figure

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