#4.4
Accuracy and Precision Lab
Lab #2
Jennie Chang (even)
Allison Yee (partner)
September 23 2010

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)

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
3
-5.0 cm
3
Volume of copper: 4.1 cm
3
7. Mass
(Mass of aluminum)

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