PPT-Significant Figures

Physical Science What is a significant figure There are 2 kinds of numbers Exact the amount of money in your account Known with certainty What is a significant figure Approximate weight heightanything MEASURED No measurement is perfect. 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 . Physical quantities. Any quantity that can be quantified by measurement is a physical quantity . Most of the quantities we deal with as scientists are physical quantities and they will be the ones we will discuss throughout this topic of motion.. 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. . 2.3. A. What are Significant Figures?. The number of all certain digits in a measurement plus one estimated digit.. Example. 2.0 cm. 1. 0. 2. 3. 4. cm. 2 Significant figures. Examples. 1. 0. 2. 3. 4. &. Scientific Notation. Significant Figures. Scientist use significant figures to determine how precise a measurement is. Significant digits in a measurement include all of the known digits plus one estimated digit. 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. The derailment on October 22, 1895 of the Granville-Paris Express that overran the buffer stop. The engine careened across almost 100 feet (30 meters) of the station concourse, crashed through a two-foot thick wall, shot across a terrace and sailed out of the station, plummeting onto the Place de Rennes 30 feet (10 meters) below where it stood on its nose. While all of the passengers on board the train survived, one woman on the street below was killed . Cartoon courtesy of . Lab-initio.com. Uncertainty in Measurement. . A digit that must be . estimated. . is called . uncertain. . A. . measurement. . always has some degree of uncertainty.. Why Is there Uncertainty?. Tonya Patterson. Chemistry. Is the study of matter and the changes it undergoes. Often referred to as the central science. Why study chemistry?. Scientific Method. A systematic approach to research. Used by all sciences. to the . right or left by . n . places until you obtain a number between . 1 and . 10. If the decimal is shifted to the right, . n . is negative and if . the decimal . is shifted to the left, . n . is positive. Then multiply the . 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 Sections Section 1 Formatting Figures within the Thesis or Dissertation p 2Information in this manual has been modified fromx0000x0000Updated by GC SST Summer 20212Section 1 Formatting Figures within Length is measured by observing the marked lines at . the end . of a ruler. The last digit in your measurement is an . estimate, obtained by . visually dividing the space between the marked lines.. Learning Goal . 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.