Monday, February 25, 2013

Accuracy And Precision

Lab 2
Measurements: Accuracy and Precision
A. data sidesteps (36 points)
locate your completed data tables into your report here:
Data Table 1
Measurement | Data |
Length of atomic number 13 plastic package |  4.50cm|
top of the inning of aluminum plastic packet |  7.50 cm|
Temperature of spigot water |  26.0 degrees Celsius|
Temperature of ice water |  10.0 degrees Celsius|
Volume of water in 10-mL
graduate cylinder |  10.0ml|
Volume of water in 50-mL
graduate cylinder | 9.0ml|
Data Table 2
Measurement | Data |
Inside diameter of 50-mL
graduate cylinder |  2.50 cm|
Height of 50-mL graduated cylinder|  10.0 cm|
Water temperature |  25.0 degrees Celsius|
Initial wad of water in 50-mL
graduated cylinder | 10.0 mL |
visual sense of water in the 50-mL
graduated cylinder (remember, 1 g of water weights 1 mL since its density is 1 g/mL) |  10.0gm|
Volume of water and aluminum shot in 50-mL graduated cylinder |  18.0ml|
Mass of aluminum shot (given on external of packet) |  20.0gm|

 B.  Follow-Up Questions (Show all calculations)
Part I (Each question is cost 10 points.)
1. convince the length and height measurements for the packet that contains the aluminum shot from units of cm to units of mm using the unit-factor method.
Length is 4.

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5cm   change factor 1cm = 10mm and 1cm/10mm
                  4.5cm = 45.0 mm
                 Height = 7.5 cm with the above conversion factor
                 7.5cm = 75.0mm

2. Convert the temperature measurements for the faucet water and the ice water from oC to oF, using the pursuit equation: oF = 1.8(oC) + 32.
Faucet H2O is 25 degrees Celsius
             45+32 = 77.0 degrees Fahrenheit  (2SF)

Ice Water is 10 degrees Celsius
18+32=40.0 degrees Celsius

3. Convert the volumes of the water in the 10-mL and 50-mL graduated cylinders from mL to L, using the unit-factor method.
10mL/1000 =...If you want to get a full essay, order it on our website: Orderessay

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