Introduction
In science we must often make use of one set of measurements to indirectly measure other quantities. One example of this type of “measurement” will be found in this experiment. We do not have the equipment to directly measure the thickness of a piece of aluminum foil or the diameter of some copper wire. We can, however, measure length and width and calculate area. We can also measure the mass and calculate the volume using the density. Volume and area can in turn be used to calculate thickness.
Materials
Background
The following equations will make it possible to perform the calculations
required by this lab:
density = mass/volume D = m/V
volume = area x thickness V = A × H
volume of a cylinder = π × radius of the base ×
height V_{cylinder} = πr^{2}h
Procedure
Data
Do not record your data here. Make tables like these in your lab notebook.
Al rectangle 1 | Al rectangle 2 | Al rectangle 3 | |
Length (cm) | XXXX | XXXX | XXXX |
Width (cm) | XXXX | XXXX | XXXX |
Area (cm^{2}) | XXXX | XXXX | XXXX |
Mass (g) | XXXX | XXXX | XXXX |
Volume (cm^{3}) | XXXX | XXXX | XXXX |
Thickness (cm) | XXXX | XXXX | XXXX |
Average Thickness (cm) | XXXX |
Copper (Cu) Wire | |
Length (cm) | XXXX |
Mass (g) | XXXX |
Volume (cm^{3}) | XXXX |
Radius (cm) | XXXX |
Diameter (cm) | XXXX |
Calculations
Perform the following calculations in your lab notebook and record the results
in the data tables you made there.
To Turn In
For this lab turn in a sheet of paper with your data tables neatly transcribed onto them. Show one sample calculation for each calculation you performed (area, volume, and thickness for the aluminum foil & radius and diameter for the copper wire). This work should be neat, easy to read, complete and should show all units. Report results with the correct number of significant figures.