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# Pancreaitits Essay

1391 words - 6 pages

Lab #3 Measurements & Density

Experiment 3A

I Purpose: To determine the area of a sheet of typing paper and express the answer in mm2, cm2, and in2.

II Equipment/Reagents: A sheet of regular typing paper and ruled provided in lab kit.

III Procedure: Measure the length and width of the sheet of typing paper and express this measurement in millimeters rounded to the nearest tenth of a millimeter. Calculate the area of the sheet using the formula:
Area= (length)(width)

IV Data or Observations:

Length | Width | Area |
...view middle of the document...

46 in3 |

V Calculations:
(64.5 mm)(25.0 mm)(25.0 mm)= 40300 mm3
(6.45 cm)(2.50 cm)(2.50 cm)= 40.3 cm3
(2.54 in)(0.984 in)(0.984 in)= 2.46 in3

VI Results/Summary: The volume of the rectangular solid was found to be 40300 mm^3, 40.3 cm^3, and 2.46 in^3.

Sierra Sisco
Lab #3 Measurements & Density
Experiment 3C

I Purpose: To determine the volume of a sphere and express the answer in mm3, cm3, and in3.

II Equipment/Reagents: Solid sphere from lab kit and vernier caliper.

III Procedure: Measure the diameter of the solid rounded to the nearest tenth of a millimeter. Record answers. Divide the diameter by two to obtain the radius. Calculate the volume of the sphere using the formula:

IV Data or Observations:

diameter | radius | volume |
20.5 mm | 10.3 mm | 4580 mm3 |
2.05 cm | 1.03 cm | 4.58 cm3 |
0.807 in | 0.404 in | 0.276 in3 |

V Calculations:
4/3 π (10.3 mm)3=4580 mm3
4/3 π (1.03 cm)3=4.58 cm3
4/3 π (0.404 in)3=0.276 in3

VI Results/Summary: The volume of the sphere was 4580 mm^3, 4.58 cm^3, and 0.276 in^3.

Sierra Sisco
Lab #3 Measurements & Density
Experiment 3D

I Purpose: To determine the densities of a rectangular solid and solid sphere and express the answers in grams/cm3. To identify each solid.

II Equipment/Reagents: Rectangular solid, solid sphere, and balance.

III Procedure: Calculate the density of each solid (in grams/cm3) using the formula:
Density = Mass/Volume
Record your answers and identity each solid by using the table below. Choose the density in the table closes to your calculated density. Round your answers to the correct number of significant digits and write the answers in the correct units.
Substance | Density (grams/cm3) |
Plastic | 0.92 |
Wood | 0.76 |
Glass | 2.6 |
Steel | 7.8 |
Nickel | 8.9 |
Chromium | 7.2 |

IV Data or Observations:

| mass | volume | density |
Rectangular Solid | 30.33 g | 40.3 cm3 | 0.753 g/cm3 |
Solid Sphere | 35.90 g | 4.58 cm3 | 7.84 g/cm3 |
| | | |

V Calculations:
(30.33 g)/(40.3 cm3)= 0.753 g/cm3
(35.90 g)/(4.58 cm3)= 7.84 g/cm3

VI Results/Summary: The density of the rectangular solid is 0.753 g/cm^3 and for the solid sphere 7.84 g/cm^3.

Sierra Sisco
Lab #3 Measurements & Density
Experiment 3E

I Purpose: To determine the density (grams/mL) of water.

II Equipment/Reagents: Balance, 25 mL graduated cylinder, plastic pipet, and water.

III Procedure: Using the plastic pipet fill the graduated cylinder with water to between 8 and 10 mL, and record the volume to the nearest tenth of a millimeter. Determine the mass of the water. Record this value and calculate the density of the water using the formula:
Density = Mass/Volume
...

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