ENGR 1166 Chapter Notes - Chapter 6: Scientific Notation, Cubic Yard, Significant Figures
Chapter 6
Engineering Measurements
and Estimations
Chapter Objectives, 1
Determine the number of significant digits in a
measurement
Perform numerical computations with measured
quantities and express the answer with the appropriate
number of significant digits
Define accuracy and precision in measurements
Define systematic and random errors and explain how
they occur in measurements
find more resources at oneclass.com
find more resources at oneclass.com
Chapter Objectives, 2
Solve problems involving estimations of the required
data and assumptions to enable a solution
Develop and present problem solutions, involving
finding or estimating the necessary data, that enable
others to understand your method of solution and to
determine the validity of the numerical work
find more resources at oneclass.com
find more resources at oneclass.com
Accuracy and Precision
Not Accurate
Not Precise
Accurate but
Not Precise
Precise but
Not Accurate
Accurate and
Precise
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Determine the number of significant digits in a measurement. Perform numerical computations with measured quantities and express the answer with the appropriate number of significant digits. Define systematic and random errors and explain how they occur in measurements. Solve problems involving estimations of the required data and assumptions to enable a solution. Develop and present problem solutions, involving finding or estimating the necessary data, that enable others to understand your method of solution and to determine the validity of the numerical work. Divide numbers of three orders of magnitude or more with spaces not commas: Any digit used to express a number, except those zeros used to locate the decimal point. 3 000(1, 2, 3, or 4 sig. fig?) 5 280 ftin a mile (4 sig. fig. ) Thenumber of significant figures depends upon several variables: instrument graduations, environment, reader interpretation, etc. Estimate between 2. 6 and 2. 7 inches or 2. 65 0. 05 inches the 4 is doubtful.
