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Units
When are Units Covered?
Units are introduced in ENGR111 during Class 6.2 and are explained further in Class 9.2.
*Explaination of Class numbering System
Objectives
| Class 6.2: |
Units and Dimensions -1 |
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Know the difference between units and dimensions |
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Understand the SI, USCS, and AES systems of units |
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Know the SI prefixes from nano- to giga- |
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Understand and apply the concept of dimensional homogeneity |
| Class 9.2 |
Units and Dimensions-2 |
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Know the difference between an absolute and a gravitational system of units |
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Know what makes a system of units a coherent or noncoherent system |
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Know how to do various conversions |
Class Agenda
| Class 6.2: |
Units and Dimensions-1 |
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Mainly lecture material on Units and Dimensions |
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Practical application to real-world situation at NASA |
| Class 9.2: |
Units and Dimensions-2 |
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Individual exercise on dimensional homogeneity |
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Lecture Material on Units and Dimensions |
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Exercise on Temperature conversions |
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Examples of various conversions |
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HW problem -given 10 minutes in class to begin solving |
Why is Problem Solving Important?
Units are used to describe all physical properties. They are crucial for determining the correct answer in the problem solving process. Units enable engineers to communicate with each other in a technical language both verbally and nonverbally.
The following systems of units are used throughout the engineering profession:
1. International System of Units (SI)
2. U.S. Customary System of Units (USCS)
3. American Engineering System of Units (AES)
Links to Class Materials
- Class 6.2 Powerpoint
- Fundamental Units (SI)
- Derivation of gc
- Class 9.2 Powerpoint
- Systems of Units
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