Submitted by: Submitted by hero8511
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Category: Science and Technology
Date Submitted: 10/13/2015 07:57 PM
Laboratory Techniques and Measurements
Exercise 1: Length, Temperature, and Mass
Data Table 1. Length Measurements.
Object | Length (cm) | Length (mm) | Length (m) |
CD or DVD | | | |
Key | | | |
Spoon | | | |
Fork | | | |
Data Table 2. Temperature Measurements.
Water | Temperature (°C) | Temperature (°F) | Temperature (K) |
Hot from tap | | | |
Boiling | | | |
Boiling for 5 minutes | | | |
Cold from tap | | | |
Ice water – 1 minute | | | |
Ice water – 5 minutes | | | |
Data Table 3. Mass Measurements.
Object | Estimated Mass (g) | Actual Mass (g) | Actual mass (kg) |
Pen or pencil | | | |
3 Pennies | | | |
1 Quarter | | | |
2 Quarters, 3 Dimes | | | |
4 Dimes, 5 Pennies | | | |
3 Quarters, 1 Dime, 5 Pennies | | | |
Key | | | |
Key, 1 Quarter, 4 Pennies | | | |
Questions
A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?
B. While heating two different samples of water at sea level, one boils at 102°C and one boils at 99.2oC. Calculate the percent error for each sample from the theoretical 100.0°C.
Exercise 2: Volume and Density
Data Table 4. Liquid Measurements.
| | Mass A | Mass B | Mass B - A | | |
Liquid | Volume (mL) | GraduatedCylinder (g) | GraduatedCylinder with liquid (g) | Liquid (g) | Densityg/mL | % Error |
Water | | | | | | |
Isopropyl alcohol | | | | | | |
Data Table 5. Magnet – Measurement Method.
Object: | Mass (g) | Length (cm) | Width (cm) | Height (cm) | Volume (cm3) | Density (g/cm3) |
Magnet | | | | | | |
Data Table 6. Displacement Method.
Object | Mass (g) | Initial volume of graduated cylinder (mL) | Final volume of graduated cylinder (mL) | Object Volume (mL) | Density (g/mL) |
Magnet | | | | | |
Metal bolt | | | | | |
Data Table 7. Archimedes’ method.
Object | Mass (g)...