PPT-Unit 1 Significant Figures

In physics we will be taking measurements and using a lot of numbers for calculations However we have to be aware of significant figures sig figs because every measurement has a certain degree of . What’s the Diff?. Accuracy. Accuracy: . How . closely a measurement matches true or actual values. To . be accurate only requires the true value (the . bulls eye. ) and one measurement (one arrow to hit . What are Significant Figures?. They are all the numbers in a measurement that are known with . certainty. plus the first digit that is uncertain.. Why use Significant Figures?. Significant figures are needed in science, because the tools we use to measure are not infinitely accurate. Easy as…. IDing. Sig Figs. Significant . Figures. . All the digits used to report a measurement including the uncertain . digit (your guess).. The only digits that are NOT considered significant are zeros that are present simply as placeholders. . Golibjon. Berdiyorov. 2. Golibjon. Berdiyorov. , Room 148 Physics Building. Phone: . 860-3869/2283. e-mail: . golib@kfupm.edu.sa. www.cmt.ua.ac.be/golib/PHYS101. Syllabus and teaching strategy. Scientific Measurements. SI Units. Significant Figures. SI Units. Measurement system universal to scientists.. Measurement standards (. base vs. derived. ). Base unit—. Quantity we can MEASURE. Derived unit--. Measuring with Precision. Defn: Those numbers that result from directly measuring an object. It shows the precision of the measurement.. Units must be included (no units no sd). The precision of the measurement depends upon the measuring instrument. When taking scientific measurements, the goals are to measure . accurately. and with . precision. .. Accuracy. . refers to how close a measured value is to the actual or real . value. Precision. . There have been many . serious incidents. that have resulted from errors in converting between systems of units.. Air Canada Flight 143. (Google it for more details). Unit Conversion Accidents. $125 million Mars Climate Orbiter.. Edition. Nivaldo. J. . Tro. Chapter 2. Measurement and Problem Solving. Dr. Sylvia Esjornson. Southwestern Oklahoma . State University . Weatherford, OK. World of Chemistry. Steven S. . Zumdahl. Susan L. . 1439/1440. Dr. Abdulaziz Alghamdi. http://fac.ksu.edu.sa/aalghamdia. aalghamdia@ksu.edu.sa. مكتب : . 2 أ 19. Reference. Topics Pages: . “. Raymond Chang. , . Chemistry, . 10. th. . edition. , 2010. using significant figures.. Aim. : . How can we round and calculate using significant figures? . Unit 1: . Chemathematics. 1.4. AGENDA. Introduction. Mini-Lesson. Summary. Work Period. Exit Slip. Do Now. Pacific/Atlantic Method636/584-6688GeneraltutoringeastcentraleduClick to advance slidesIn wordsRule 1 All non-zero digits are significantRule 2 Zeros in front of a number are notsignificantRule 3 Z 1 All non-zero digits are always significant154 3 sig figs 2 Interior zeros zeros between nonzero numbers are3 Leading zeros zeros at the beginning of a number are NOT 0103 3 sig figs 0000002 1 Mrs. Charniauskaya. Metric System. Scientists all over the world use the same system of units so they can communicate information clearly . This system is called . Système. . Internationale. . d’Unités.