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Week_10_Lecture_-_Engineering_Calculatio

# Week_10_Lecture_-_Engineering_Calculatio - EGR 100...

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1 EGR 100 Week 10 Lecture 1 EGR 100 Introduction to Engineering Design Engineering Calculations EGR 100 Week 10 Lecture 2 Engineering Calculations Engineers make assumptions & approximations to assign numerical values to unknown quantities using common sense, experience, intuition & knowledge of physical laws What methods do engineering employ to make calculations?

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2 EGR 100 Week 10 Lecture 3 Engineering Calculations Mathematical Methods? Mental Pencil & paper (Divide & Conquer) Hand calculator Lower-level software Higher-level software Specialized software EGR 100 Week 10 Lecture 4 Engineering Calculations When do you use which method? Depends on level of accuracy required Ex: Traffic Study Data shows car count per hour of: 1 48 cars; 2 53 cars; 3 51 cars Cars expected in an 8 hour period? Which method did we use?
3 Engineering Estimation Determine how much oil (barrels) the U.S. consumes in each year. Your guess is ( 30 seconds ): A. 50-100 million barrels B. 500-750 million barrels C. 1-10 billion barrels D. 50-100 billion barrels E. 1 trillion barrels EGR 100 Week 10 Lecture 5 Divide & Conquer Example What mental methods may we use to determine an estimate? What data do we have? Number of vehicles Average miles driven per year Average fuel economy Number of gallons of fuel per barrel EGR 100 Week 10 Lecture 6

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4 Divide & Conquer Example Again, determine how much oil (barrels) the U.S. consumes in each year. Your guess is ( 60 seconds ): A. 50-100 million barrels B. 500-750 million barrels C. 1-10 billion barrels D. 50-100 billion barrels E. 1 trillion barrels EGR 100 Week 10 Lecture 7 Divide & Conquer Example What data do we have?
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Week_10_Lecture_-_Engineering_Calculatio - EGR 100...

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