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Domestic work is an important avenue of work for semi literate or illiterate people especially women in India since 73 percent of the female workforce is illiterate or educated only up to the prima. Candidate 3. The three developments. Nitinol archwires in braces. Lingual Braces. Invisalign. What’s the Point…?. To correct malocclusions—Improper bites. Nitinol . Archwire. Shape Memory Alloy . Learning Goals …. … convert numbers to scientific notation. … convert measurements using the metric system. … identify the number of significant digits in a . measurement . Scientific Notation. 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.. Objectives:. State the purpose of significant digits. State and apply the rules for counting and doing calculations with significant digits. One way engineers use significant digits….. What's so significant about significant digits?. L/O – To consider how some people or events are more significant than others and explain why. Starter – You have 4 minutes to list the three most famous people in the world today!. Was Horatio Nelson really so significant?. 5700. 1. 2. 3. 4. Multiply. 843.5 * 21103. 17800380.5. 1.780 x 10. 8. 1.780 x 10. 7. 17800000. Which of the following instruments would give you the most accurate measurement?. Round to 3 significant digits.. 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. . Dr.. . Shahid. . Dadabhoy. General Practitioner and General Practice Trainer. The . Microfaculty. , 107-109 Chingford Mount Road, Chingford, London E4 8LT. shahid.dadabhoy@nhs.net. Programme. 1300. . 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 . SignificantFigureRulesDetermining Number of Significant Figures Sig Figs All non-zero integers are significantample412945 has 6 sig figs All exact numbers have an unlimited number of sig figs ample 2 Diploma ExaminationsSignificant Digits measured values1For all non-logarithmic values regardless of decimal position any of the digits 1 to 9 is a significant digit 0 may be significant For example 12 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 . 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.