Measurement in Experiments

Slides:



Advertisements
Similar presentations
Precision in Measurements
Advertisements

Physics Rules for using Significant Figures. Rules for Averaging Trials Determine the average of the trials using a calculator Determine the uncertainty.
Calculations with Significant Figures
Aim: How can we perform mathematical calculations with significant digits? Do Now: State how many sig. figs. are in each of the following: x 10.
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.
How many significant figures?
Significant Numbers All numbers in a measurement that are reasonable and reliable.
Significant Figures and Scientific Notation Significant Figures:Digits that are the result of careful measurement. 1.All non-zero digits are considered.
Significant Figures. Rules 1.All nonzeroes are significant 2.Zeroes in-between are significant 3.Zeroes to the left are not significant 4.Zeroes to the.
Significant Figures SIG FIGS!!!!!!!. Importance of Sig figs Sig figs tell people the precision of a value. Precision: how many times you can achieve the.
Significant Figures (HOW TO KNOW WHICH DIGITS OF A NUMBER ARE IMPORTANT)
Significant Figures in Calculations. A calculated answer cannot be more precise than the least precise measurement from which it was calculated. The answer.
Percent Composition. Molar Mass Calculate the Molar Mass of H 2 O 1 mole of H 2 O contains 2 mols H and 1 mol O. The mass of 2 moles H = 2 mol(1.008 g/mol)=
Significant Figures Part 2 Problem Solving Applications.
Drill – 9/14/09 How many significant figures: Now complete the back of the measurement worksheet from last week (the graduated.
Significant Figures Multiplying and dividing. Multiplying and Dividing with Significant Figures When multiplying or dividing numbers round the answer.
Mastery of Significant Figures, Scientific Notation and Calculations Goal: Students will demonstrate success in identifying the number of significant figures.
Significant Figures. Significant Figures One sig fig One sig fig Two sig figs One sig fig One sig fig One sig fig four sig figs.
Significant Figures. Rule 1: Digits other than zero are significant 96 g = 2 Sig Figs 152 g = __________ Sig Figs 61.4 g = 3 Sig Figs g = __________.
Significant Figures. Significant Figure Rules 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9)
Step One: Do the math. Step Two: Identify the number of significant figures within the problem set. Step Three: Convert your answer to the lowest number.
Mastery of Significant Figures, Scientific Notation and Calculations Goal: Students will demonstrate success in identifying the number of significant figures.
Be able to carry out basic mathematical operations using numbers expressed in scientific notation, without changing them to decimal notation. Be able to.
Mathematical Operations with Significant Figures Ms. McGrath Science 10.
Significant Figures. Rule 1: Nonzero numbers are always significant. Ex.) 72.3 has 3 sig figs.
ADDING AND SUBTRACTING MULTIPLYING AND DIVIDING REAL NUMBERS.
Adding, Subtracting, Multiplying and Dividing with Sig Figs.
Rules for Significant Figures
Unit 3 lec 2: Significant Figures
Significant Figures.
Part 2 Significant Figures with Calculations
Significant Figures Sig Figs.
Precision in Measurements
Measurement: Significant Figures
Scientific Notation and Significant Figures
Significant Figures.
Aim: Why are Significant Figures Important?
Review of yesterday… How many sig figs are in the following? 0.02
Significant Numbers in Calculations
Significant Figures.
1.6 – Calculating with Significant Figures
Sig Fig Math and Application
Our Friends, the Significant Figures
Significant Figures
Rules for Significant Digits
Significant Figures General Chemistry.
Sig Fig Math and Measurement
Significant Figure Review
Significant figures RULES TO MEMORIZE!.
Random error Systematic error.
Unit 1 lec 3: Significant Figures
Multiplying and dividing
SIGNIFICANT DIGIT RULES
The Integer Song.
Significant Figures and Percent Error
Chapter 1 Working with Numbers PPT D
Arithmetic & Significant Figures.
Significant digits.
Significant Figures or Digits
For more information, please read your textbook pages 66-71
Significant Figures.
Significant Figures.
5. Significant Figures- = represent the valid digits of a measurement and tells us how good your instrument is.
Multiplying and dividing
Scientific Notation & Significant Figures
Manipulating Sig Figs - Notes B
Happy Birthday to Niels Bohr (1885)
The Mathematics of Chemistry
Is it OK to write down all digits on your calculator?
Our Friends, the Significant Figures
Presentation transcript:

Measurement in Experiments Part 2

Significant Figures Another way of being precise with measurements. Can you think of any situations where it’s important to be precise in measurement? Rules to calculate whether numbers are significant or not…

The rules

Adding/ Subtracting/ Multiplying/ Dividing Your answer should always contain the LOWEST number of sig figs represented in the problem For example: 97.3+5.85= 101.15 103.2 123x5.35= 658.05 658

If you get finished… Review on page 20, numbers 1-3