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Dimensional Analysis Converting the Big Kids Way!
So Go Back to Conversions 1 m = __________ mm m = 1000 mm 1 m = mm.
Other Conversions 100 cm = 1 m 1000 g = 1 kg 10 dL = 1 L 100 cm = 1 1 m 1 m = cm OR
Periodic Table Find the conversions on your periodic table
Dimensional Analysis First know what you START WITH! –Dont forget units –Dont lose decimal point Second know what you END WITH –It is usually unknown except for the unit.
Put it together Start: 360 s End: x ms 360 s x (some conversion) (rest of conversion)
Put it together Think: Which gets rid of s So you have to use SSSS S x S SSSS OR
Put it together Start: 360 sEnd: x ms 360 s x (some conversion) = something s SSSS
Put it together Start: 360 sEnd: x ms We want ms so it goes in the numerator 360 s x something ms something s Find the conversion on your periodic table
Put it together Periodic Table: 1 ms = 1 x s 1 ms. 1 x s 1 x s 1 ms OR
Put it together Start: 360 sEnd: x ms End: x ms Which works better? –3–360 s x –3–360 s x 1 ms. 1 x s 1 ms
Put it together 360 s x Put it in your calculator 360,000 ms 1 ms. 1 x s
Steps to Dimensional Analysis 1.Label start (with unit) 2.Label end (with unit) 3.Identify conversion factor 4.Set up railroad 5.Write answer 6.Sig Fig final answer
Practice Convert 12 moles H to grams H.
Metric Conversions w/o Dimensional Analysis Just move the decimal!!
Chemistry 100 Significant Figures. Rules for Significant Figures Zeros used to locate decimal points are NOT significant. e.g., 0.5 kg = 5. X 10 2 g.
Do You Know Your Conversions?. Metric Conversions Click on the space bar when you want to reveal the answers. 1 cm = ____ mm 1 dm = ____ cm 1 m = _____.
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MEASUREMENT AND CALCULATIONS Chapter 9.2. Significant Digits ► The international agreement about the correct way to record measurements: ► Record all.
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Significant figures A significant figure represents an actual measurement A measurement of all the digits known with certainty, plus one that is estimated.
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SL#14 How to use Conversion Factors (a.k.a. Dimensional Analysis)
Measurement and Sig. Fig. Practice A. Identify the number of significant digits in each of the following measurements. Write the number in the space provided.
Scientific Notation & Dimensional Analysis Chapter 2.2.
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C. Johannesson I. Using Measurements (p ) CH. 2 - MEASUREMENT.
Physics Tools and Standards Each discipline has a language. The language of physics is math! What are the mathematical tools you need to succeed?
MEASUREMENT AND CALCULATIONS Chapter 9.2. Significant Digits When we measure and calculate values, we can only use a number of digits in our answer that.
Factor Labeling or DA Problem Solving: The easy way!!!
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International system of unit. International system of units.
Topic: Chem Math Aim: How do you perform unit conversions? What is the factor label method? Do Now: How many inches in a foot? Feet in a yard? So… how.
I II III I. Using Measurements (p. 8-15) CH MEASUREMENT.
Almost all other countries are using the metric system Other countries’ companies are refusing to buy products from the U.S. if not labeled in metric.
Dimensional Analysis Factor Labeling. Dimensional Analysis This is a method of problem-solving which ___focuses______ on the units.
Chemistry Chapter 3 Review Game. Sig Figs Calculations Conversion FactorsDensity 1 point 1 point 1 point 1 point 1 point 1 point 1 point 1 point 2 points.
Scientific Notation Scientific Notation: a method for __________________________________________. Moving the decimal to the _______________exponent, to.
Course Outline Math Review Measurement Using Measurements.
I II III Using Measurements MEASUREMENT. Accuracy vs. Precision Accuracy - how close a measurement is to the accepted value Precision - how close.
No decimal: Everything EXCEPT 0’s at the end (4100 2 sig. fig.’s) Decimal: Everything EXCEPT 0’s at the beginning ( 2 sig. fig.’s) (1000. 4.
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I II III C. Johannesson I. Using Measurements (p ) CH. 2 - MEASUREMENT.
METRIC SYSTEM. Measuring Systems were confusing!!! Everyone used a different method!! We did not speak same language!! Could Not trade!!
Significant Figures. Why do we need to know significant figures? We as scientists need to measure things as we perform experiments. Instruments have different.
Introduction: Matter and Measurement Chapter 1. Uncertainty in Measurement The term significant figures refers to digits that were measured. When rounding.
Significant Figures Part II: Calculations. Objectives When you complete this presentation, you will be able to – determine the number of significant figures.
megameter (Mm) 1,000,000 meters = 1 Mm kilometer (km) 1,000 meters = 1km hectometer (hm) 100 meters = 1hm decameter (dam) 10 meters = 1 dam
Rule 1: When multiplying and dividing, limit and round to the least number of significant figure in any of the factors. Example 1: 39.0 mm X 385 mm X.
Significant Figures Rules If the decimal is Present, then go to the Pacific side of the measurement, count the first non-zero number and count all other.
Thursday!!!!! 9/1/11 Bell Ringer Get out your Numbers in Science lab, your notes from yesterday, and complete your lab. Turn it in to your tray when you.
Factor Label Method Discussion also called “dimensional analysis” used to convert units and solve problems.
Organized method of problem-solving Used in chemistry, physics, engineering, and medicine Communicates the path to scientists that follow your work Records.
Unit 2:SCIENTIFIC MEASUREMENT OBJECTIVES (Don’t Copy!) Convert Between Standard Notation to Scientific Notation Identify Significant Figures & Uncertainty.
Chapter 2 Data Analysis, Part II. Metric Conversions Move the decimal to the right Move the decimal to the left o Every metric unit is different from.
Uncertainty in measurement Every measurement has error associated with it. The more precise the measurement the less error. Error in a measurement.
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