Lab Notes - Lab 1- Measurement of Bulk Volume and...

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Lab 1- Measurement of Bulk Volume and Statistical Analysis 1. Precision- How closely to be repeated “reproducibility” 2. Accuracy- How closely to the answer “exactness” 3. Standard Deviation- shows the degree of “spread or scatter” of samples 4. Vernier caliper- accurately measures the length of an object. 5. 1 atm= 76 mm Hg = 14.7 psi/ [lb/in^2] How to do Lab 1. Know how to Measure on the Vernier Caliper 2. Measure bulk volume= 3.14 x D x D x L/4 3. Mean= Average 4. Standard Deviation Equation: 5. Temperature: a. K= C + 273.15 b. R= F + 459.67 6. Know Significant Figures Lab 2- Gauge Calibration and Statistical Analysis 1. Know how to find the straight-line fitting (linear/nonlinear regression)- a=y-mx 2. Correlation Coefficient (r) – Based on the trend line, a measure of match with the measured data is obtained by adding up errors or “residuals” given by Sr. 3. Standard Deviations Equation 4. Square of correlation of coefficient r^2 equation 5. Understand Sr. Concept Graphs How to do the Lab 1. Absolute pressure = gauge pressure + atmospheric pressure 2. P_true (y) = a + mP_measured (x)b 3. Measuring pressure 4. Find Residual, Sr= 5. Standard Deviation, S_(y/x) 6. Mean of Y 7. Total Sum of Squares, St 8. The square of the Correlation Coefficient (r^2) Lab 3- Specific Gravity and Density of Liquids Equipment for Specific Gravity and Density of Liquids Lab Pycnometer (From the Greek pukos meaning “density” also called pyknometer or “specific gravity bottle” ) - A flask with a close-fitting glass stopper with a small hole through it. - Measures volume density of a fluid to be calculated by measuring the weight - If density is known, measure weight volume Hydrometer - Directly measures liquid density by floating the hydrometer in the liquid - Normally a set of hydrometers to deal with a different range of densities Westphal Balance - Directly measures fluid density using plummet, fluid, and riders. -
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This note was uploaded on 10/25/2011 for the course ECON 2030 taught by Professor Russel during the Spring '11 term at LSU Health Sciences Center.

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Lab Notes - Lab 1- Measurement of Bulk Volume and...

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