Accuracy and precision lab#2 - #4.4 Accuracy and Precision...

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#4.4 Accuracy and Precision Lab Lab #2 Jennie Chang (even) Allison Yee (partner) September 23 2010
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Calculations: 1.Volume (Volume of cylinder(100 ml) to 50.0ml graduation) Equation: Volume = π r 2 x H r= radius H= height Sample from data: Volume = 3.14(1.38cm) 2 x 8.65 cm Volume = 51.73 cm 3 2. Percent Error ( Percent error of volume of cylinder) Equation: Percent error= [(experimental value- accepted value)/ accepted value] x 100% Sample from data: [(51.73 cm 3 – 50cm 3 ) / 50cm 3 ] x 100 % = 3.46 Percent error: 3.46% 3. Mass ( Mass of water as measured by balance) Equation: Mass of water= mass of cylinder and water – mass of cylinder Sample from data: 32.02g – 26.98g= 5.04g Mass of water: 5.04g 4. Mass (Mass of water from its measured volume and density) Equation: Mass of water= density of water x volume of water Sample from data: 0.997992 x 5.0 Mass of water: 4.97994g 5. Percent Error (Percent error of water) Equation: Percent error= [(experimental value- accepted value)/ accepted value] x 100% Sample from data: [(4.97994-4.83)/4.83]x 100% = 3.10434 Percent error= 3.10434% 6. Volume (Volume of aluminum)
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Equation: Volume of water w/aluminum – Volume of water Sample from data: 9.1cm 3 - 5.0 cm 3 Volume of aluminum: 4.1 cm 3 (volume of copper) Equation: Volume of water w/copper – Volume of water Sample from Data: 9.1ml
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Accuracy and precision lab#2 - #4.4 Accuracy and Precision...

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