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 . 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, height—anything MEASURED. No measurement is perfect.. 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. References :. Basic Principles and Calculations in Chemical. Engineering, 7 edition,. . . David. M. . Himmerblau. and James B. Riggs.. ปริมาณสัมพันธ์สำหรับงานอุตสาหกรรม เล่ม . Measurements and Their Uncertainty. 3.1. 3.1. Measurements are fundamental to the experimental sciences. For that reason, it is important to be able to make measurements, and to use them correctly when calculating answers.. 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.. 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?. 4.72006 s. 0.0003 km. 400 mL. 320.0 mg. How many significant figures are there in each of the following measurements? . 4.72006 . s . (6 significant figures). 0.0003 . km . (1 significant figure). 400 . 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. 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. 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 . 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. 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.