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Basic Principles and Calculations in Process Technology by T. David Griffith

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Chapter 3. Units of Measure

3.1 Time

3.2 Length

3.3 Volume

3.4 Temperature

3.5 Mass, Weight, and Force

3.6 Vectors

3.7 Torque, Moments, and Couples

3.8 Density and Specific Gravity

3.9 The Mole Unit

3.10 Concentrations

3.11 Pressure

3.12 Work and Power

3.13 Accuracy, Precision, and Variance

3.14 Engineering Accuracy and Significant Figures

3.15 Scientific Notation

3.16 The Vernier Scale

3.17 Prefixes: M versus m

3.18 Concluding Comments

References

Problems

Before we can delve into the engineering aspects of the chemistry and physics of process operations, we must establish a consistent set of measurements for process variables. Otherwise, we are only guessing at what is happening. To quote Lord Kelvin, “When you can measure what you are speaking ...

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