CH. 2 - MEASUREMENT. III. Using Measurements (p. 44 - 57). A. Accuracy vs. Precision. Accuracy - how close a measurement is to the accepted value Precision - how close a series of measurements are to each other. ACCURATE = CORRECT PRECISE = CONSISTENT. Let’s use a golf analogy.

ByUnits, Measurement, Significant Figures & Conversions. Physics. SI Units. The SI Units we will be concerned with mostly are: Quantity Unit Length/Distance Time Mass Temperature . meter [m] second [s] kilogram [kg] Kelvin [K]. SI Units.

ByRounding and Approximation. 17. 24500 2 sig. fig. 0.0125 2 sig. fig. 0.00348 3 d.p. 205.399 Nearest whole number. 24.1. 3.65. 3,945,724 Nearest 10000. 25000. 0.1. 460. 4288 Nearest 10. 1.0. 29470 Nearest 100. 459.96 1 d.p. 0.0639 Nearest whole number. 3.652 2 d.p.

BySignificant Figures and Measurement Geneva High School. Exact & Measured Numbers. There are 2 different types of numbers Exact Measured Measured number = they are measured with a measuring device so these numbers have ERROR. Also, we all read measuring instruments slightly differently.

By2011 in Review Bodine High School. Paul Finn SAT:TAS Winter Retreat Thursday, January 19 th , 2012 The Franklin Institute, Philadelphia Pa. The work reported herein was supported by the National Science Foundation, award # 0841377, through a grant to Temple University.

BySignificant Figures/Accuracy and Precision. Accuracy vs Precision. Accuracy = Precision =. How close you are to the correct answer. How close your answers are to each other. Percent Error. You can quantify how accurate you are by calculating the percent error of your measurement

BySig Fig clicker worksheet practice. John counted out ten dollar bills . Exact Inexact (measured). How many significant figures? 28.5. 3 SF. W hich one has more significant figures? 6.321 cm and 6.3214 cm. Enter the correct answer in clicker. 7.623 ml + 85.0 ml + 9.815 ml =

BySignificant Figures (Sig Fig) Rules. Determining Sig Figs. 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 2) ALL zeroes between non-zero numbers are ALWAYS significant. 3) ALL zeros to the left of the number are NEVER significant

BySignificant Figures. Rule 1:. Non-zero digits are significant. Ex: 453 kg All non-zero digits are always significant # of Sig Fig’s? 3!. Rule 2:. Zeros between non-zero digits are significant. Ex: 5057 L Zeros between 2 Sig. Fig’s. are significant # of Sig. Fig’s?? 4. Rule 3:.

ByOur Friends, the Significant Figures. Significant Figures (“ Sig Figs ”). All digits in a measurement that are known for certain, plus the first estimated (uncertain) digit Sig figs give an indication of the degree of precision for a measurement and/or a calculation

ByMeasurement and Significant Figures. www.lab-initio.com. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

BySig Fig Calculations and Density. Password Rules. Trying to get volunteer to say the word on screen Can’t say the word or any part of it Person with ace goes first Person with two does second word etc. Beaker. Graduated Cylinder. Fire Blanket. Watermelon. Significant Figures. Hawaii.

BySignificant Figures (aka sig figs). Sig Figs. Significant Figures – the reliable digits in a measurement based on the precision of the device In other words, the MORE sig figs it has the more PRECISE the number is. Why are Sig Figs important?.

ByUnit 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 uncertainty .

ByMeasurement and Significant Figures. www.lab-initio.com. Steps in the Scientific Method. 1. Observations - quantitative - qualitative 2. Formulating hypotheses - possible explanation for the observation 3. Performing experiments - gathering new information to decide

BySignificant Figures. Why care?. Allows us to be accurate with the information we actually have. Rules. All nonzero numbers are significant. Ex: 432 = 3 sig figs 0’s between nonzero numbers are significant Ex: 401 = 3 sig figs

BySignificant Figures!. A.K.A. Sig. Figs. Actual measured #’s, not placeholders Two techniques: Numbers with decimals Numbers without decimals. NUMBERS WITH DECIMALS. Zero's in front of the number do not count. All other digits including the ZERO’S at the end are significant!.

ByDO NOW!. Take out your SI Conversion notes from last week. Complete page 1 using this slide. Metric system is based on powers of 10 Standard units in the metric system are meter, liter, gram Prefixes

ByUsing in calculations. For multiplication and division. Your answer can not be more accurate than the least accurate measurement. Your answer MUST have the same number of sig figs as the least number of sig figs. Rounding Numbers. Five or more round up. Examples. 135 x 32 = 4320.

ByKc starter wc 05.11.12 The reaction between nitrogen and hydrogen is given below: N 2 + 3H 2 = 2NH 3 1.0 moles of nitrogen were reacted with 3.0 moles of hydrogen in a 1.0 dm 3 vessel at 450⁰C. At equilibrium, 0.80 moles of ammonia formed. Write an expression for Kc

ByView Sig fig PowerPoint (PPT) presentations online in SlideServe. SlideServe has a very huge collection of Sig fig PowerPoint presentations. You can view or download Sig fig presentations for your school assignment or business presentation. Browse for the presentations on every topic that you want.