'Significant figure' diaporamas de présentation

Accuracy & Precision

Accuracy & Precision. Two important points in measurement. Accuracy and Precision At the conclusion of our time together, you should be able to:. Explain the difference between the accuracy and precision Give examples of accuracy and precision. Accuracy.

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Errors in Chemistry Experiments

Errors in Chemistry Experiments. Rohana Sirimanna. Reading errors (Data Collection). When reading off a scale the error is half the last decimal place you can use or the value given to you for this piece of equipment. Electronic Balance If it reads to 0.001 g the

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Fundamental Physics

Fundamental Physics. Chapter 1. Physics. Fundamental Science concerned with the fundamental principles of the Universe foundation of other physical sciences Divided into six major areas Classical Mechanics Relativity Thermodynamics Electromagnetism Optics Quantum Mechanics.

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1.3 More About the Metric System

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Chemistry: An Introduction to Matter

Chemistry: An Introduction to Matter. Chapter 1. Chemistry is the study of matter and the changes it undergoes. Matter is anything that occupies space and has mass. A substance is a form of matter that has a definite composition and distinct properties.

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PTT 108 MATERIAL AND ENERGY BALANCE

PTT 108 MATERIAL AND ENERGY BALANCE. Semester 2 Academic session 2012/2013. NOORULNAJWA DIYANA YAACOB. CHAPTER 2 INTRODUCTION TO ENGINEERING CALCULATIONS Week 1. CONTENT. UNITS & DIMENSIONS CONVERSION OF UNITS SYSTEMS OF UNITS FORCE & WEIGHT SIGNIFICANT FIGURES

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Chapter 1 : The Science of Physics

Chapter 1 : The Science of Physics. 1-1 Areas Within Physics. The Scientific Method. Make observations and collect data. This step leads to a question Formulate and test a hypothesis by experiments. Hypotheses must be testable Interpret results and revise the hypothesis as necessary

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Warm-up 8-21-12

Warm-up 8-21-12. Fill in the Venn Diagram with the appropriate number sets, and in the order in which they go. R. Q. Z. N. Warm-up 8-22-12. Find the value of k 7.34 x 10 k = 734 million Let x = 123.5 and y = 630.19 Write in full the number x 2 + 4y

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Chemistry SOL Review by Anne Mooring (Jamestown High School, Williamsburg VA, 2006)

Chemistry SOL Review by Anne Mooring (Jamestown High School, Williamsburg VA, 2006). Part 1: Scientific Investigations Lab Equipment Scientific notation Significant figures The Metric System Density measurement and calculations Lab Methods Accuracy and precision Error Analysis

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SIGNIFICANT figures

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Scientific Notation, Percent Error, Derived Units, Specific Gravity

Scientific Notation, Percent Error, Derived Units, Specific Gravity. Section 2.1 and 2.8. Scientific Notation. Rules for placing numbers from standard form into scientific notation: Write all the significant digits of the numerical portion of the value.

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How should data be reported in Chemistry?

How should data be reported in Chemistry?. There are two kinds of numbers :. Exact numbers : may be counted or defined (they are absolutely accurate). Numbers obtained from measurements are not exact. These measurements involve estimating. You can report one estimated digit. 6.3 5 or

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Practice Problems Section 11.1

Practice Problems Section 11.1. You can convert pressure measurements to other equivalent units. The method used to convert units of measurement to other units is called dimensional analysis .

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iChem Math: Significant Figures

iChem Math: Significant Figures. Significant Figures. Measure of precision Two issues: how to create sig figs in the lab how to interpret sig figs when already written. . Creating Sig Figs in the Lab. Record all digits known with certainty + 1 estimated digit.

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Error in Measurement

Error in Measurement. Some error or uncertainty always exists in any measurement. skill of the measurer limitations of measuring instruments When recording measurements, report all digits known for certain plus one last digit that is an estimate. Recording Measurements.

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Dimensional Analysis

Dimensional Analysis. Dimensional analysis is a problem solving method that uses the fact that any number or expression can be multiplied by one without changing its value. Ex: Change 5.46 x 10 6 km to picometers Change 3601 g to megagrams Change 3601 g to nanograms.

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If there are 5 frumious Bandersnatches , how many Jabberwocks should there be?

If there are 5 frumious Bandersnatches , how many Jabberwocks should there be? There are 20 tumtum trees in the tulgey wood. In each tulgey wood is one frumious Bandersnatch . There are 5 slithy toves in 2 borogoves . There are 2 mome raths per Jabberwock .

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Number

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Commerce + Culture

Commerce + Culture. 500-1500 CE. Post Classical/Medieval. In between Classical + Modern Eras Interaction between civilizations Trade: new technologies, food/spices, animals, disease Roads (land, sea, sand)

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