Anyways, the lab was determining aluminum foil thickness. For this lab, the thickness will be an indirect measurement because we can't directly measure the thickness since it's so thin. So to determine the thickness, we used 2 formulas.
Volume: V=LWH (Length x Width x Height)
Density: D=m/V (mass/volume)
The density formula is first used because we know the density of aluminum and mass. This gives us the volume. Next, is to figure out the height (thickness). We can do that by using the volume formula since we know the volume and length and width. An example would be:
If you're given this information...density of the aluminum foil is 2.70 g/cm^3, length= 15.57 cm, width= 13.56 cm, and mass is 0.85g, what is the thickness?
If D=M/V then it would be... 2.70g/cm^3= 0.85/15.57 x 13.56 x H
570.04884H=0.85
H= 0.0014911
= 1.49 x 10^-3 cm
Once, the thickness was determined for all 3 sheets of aluminum foil, we found the average. We gave it in proper scientific notation and with the right amount of sigfigs. Then we compared it to the accepted value by comparing how accurate we were and how precise. To find the percent experimental error...
On the other hand, here's a little cartoon to lighten the mood? =P
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