I need help with the following Lab due tonight, 7/30/12, as I feel completely lost and would appreciate the help. The lab goes as follows:
Design an experiment that illustrates the determination of the density of a cylindrical object found in the Lab Kit.
Prepare a dynamic Excel spreadsheet to record data and perform the calculations necessary to find the densities and compute the percent difference between them.
Make the necessary measurements that allow the calculation of the volume of the object by the two methods described above (i.e., direct measurement with a ruler and water displacement). Note: If there is no access to a balance (or scale) to measure the mass of the cork, use 4.65 g for the mass.
Record this data in the Excel spreadsheet.
Write the Laboratory Report using the steps outlined above (steps 1-9) in Microsoft Word. Steps (6, 7 and 8) are placed in the Excel spreadsheet and the spreadsheet is placed in the Word document.
To complete this lab, you will need to follow these steps:
1. Gather all the necessary materials from the Lab Kit, including the cylindrical object, a ruler, water, and a balance (if available).
2. Begin by taking measurements of the cylindrical object. Measure its height using a ruler and record this value.
3. Measure the diameter of the object using a ruler. If the object does not have a circular cross-section, measure its widest section and assume it to be the diameter.
4. Use the measurements from Step 2 and Step 3 to calculate the volume of the object. For a cylindrical object, the volume can be calculated using the formula V = πr^2h, where r is the radius (half of the diameter) and h is the height.
5. Now, you will need to find the mass of the object. If you have access to a balance, weigh the object directly and record its mass. If not, use the provided value of 4.65 g for the mass.
6. Calculate the density of the object using the formula density = mass/volume.
7. To determine the density by water displacement method, fill a container with water and record its initial volume.
8. Carefully place the cylindrical object in the water and measure the new volume. Subtract the initial volume from the final volume to find the volume of water displaced.
9. Use the formula from Step 6 to calculate the density of the object using the volume obtained from the water displacement method.
10. Create an Excel spreadsheet to record the data and perform the necessary calculations. Label the columns with the appropriate headings, such as height, diameter, mass, volume, density (direct measurement), volume (water displacement), density (water displacement), and percent difference.
11. Enter the measured values for height, diameter (or widest section), and mass into the Excel spreadsheet.
12. Use the formulas mentioned in Steps 4, 6, and 9 to calculate the volume, density for direct measurement, and density for water displacement.
13. Compute the percent difference between the two densities using the formula [(density (water displacement) - density (direct measurement)) / density (direct measurement)] * 100.
14. Once all the calculations are complete, save the Excel spreadsheet.
15. Open a Microsoft Word document and write the laboratory report. Follow the provided steps (1-9) in the Word document for the report.
16. Paste the Excel spreadsheet into the Word document, placing it after steps 6, 7, and 8.
17. Review and proofread the laboratory report, ensuring all the steps and calculations are accurately presented.
18. Save the completed Word document and submit it before the specified deadline.
Remember, in case of any uncertainties or difficulties, it is always advisable to consult your lab manual, instructor, or classmates for clarification and assistance. Good luck with your lab!
To complete the lab, you will need to follow these steps:
1. Gather the materials needed for the experiment, including the cylindrical object, a ruler, a beaker or graduated cylinder, water, and an Excel spreadsheet.
2. Start by measuring the dimensions of the cylindrical object using a ruler. Record the length, diameter, and any other relevant measurements in the Excel spreadsheet.
3. Fill the beaker or graduated cylinder with a known volume of water, making sure to record this initial volume in the spreadsheet.
4. Carefully submerge the cylindrical object in the water, making sure it is completely immersed. Measure the increase in water level and record this volume in the spreadsheet.
5. Use the recorded dimensions to calculate the volume of the cylindrical object using the formula for the volume of a cylinder: V = πr^2h, where r is the radius and h is the height or length. Record this calculated volume in the spreadsheet.
6. In the Excel spreadsheet, calculate the density of the object using the formula: density = mass/volume. If the mass of the cylindrical object is provided, divide the mass by the volume to find the density. If the mass is not provided, use the given value of 4.65 g for the mass.
7. Calculate the percent difference between the densities determined by the direct measurement with a ruler and the water displacement method. To calculate the percent difference, use the formula: percent difference = |(density1 - density2)| / [(density1 + density2) / 2] * 100.
8. Transfer the data and calculations from the Excel spreadsheet into a Microsoft Word document to create the laboratory report. Include any necessary tables, charts, or graphs to present the data and results effectively.
9. Write the laboratory report according to the guidelines provided by your instructor, incorporating the steps outlined above and any additional requirements specified.
Remember to complete the lab by tonight, and if you encounter any specific issues or questions during the experiment, feel free to ask for further assistance!