Problem Solving Lab: Finding the Thickness of Copper Foil

Purpose: To determine the thickness of a piece of Cu foil without directly measuring it.

Materials allowed: copper foil(rectangular-shaped), balance, ruler

Hint: You’ll need to use one of copper’s characteristic properties:

melting point = 1083 ^oC

density = 8.96g/cm³.

Conductivity = 0.94 mW^-1

Requirements for Report: In your report, write your procedure, record your data in a table, include the reasoning and show your calculations in the analysis, and write a conclusion.

Make sure you measure to two decimal places (ruler)

Balance: use 1 decimal place regardless of digit after the deimal

Sample Measurements

Length(cm)	7.50
Width(cm)	3.240.02
Mass(g)	2.70.1

Constant Density of Cu 8.96 g/cm³

Calculations A = lw = 7.50 X 3.24 = 24.3 cm²

V = m/d = 2.7/8.96 = 0.301 cm³

Thickness = V/A = 0.301 cm³/24.3 cm² = 0.124 0.006

Errors 0.02/7.5 + 0.02/3.24 +0.1/2.7 = 0.046 = 4.6%

0.046*0.124 = 0.006