Determining Aluminum Foil Thickness
Formulas you might use
--V=L*W*H
volume = length * width * height
--D=m/V
density = mass / Volume
--Unknowns
volume;height
--Knowns
mass;width;length;density
--Formula we are using
volume = mass / density
height = volume / (length*width)
Aluminum Foil
--Al
--92%~99%
--silvery white metallic element
--Density: 2.70g/cm*3
Objectives
--to understand the key point of precision and accuracy
--to calculate the thickness(height) of the aluminum foil
--to use absolute uncertainty in expressing your answers
Supplies
--3 pieces of aluminum foil
--metric ruler
--centigram balance
Procedure
--label three aluminum sheets 1,2 and 3
--use a metric ruler to measure the dimension of each aluminum foil
--measure the mass of each aluminum foil
--express your answer in scientific notation with proper significant numbers and absolute uncertainty
length (cm) width (cm) mass (g) Thickness(cm)
1 16.80 ± 0.01 15.31±0.01 1.01±0.01 1.45*10^-3
2 17.01±0.01 15.60±0.01 1.08±0.01 1.51*10^-3
3 17.41±0.01 14.59±0.01 1.02±0.01 1.49*10^-3
