Lab 2E

Lab 2E: Determining aluminum foil thickness

Objectives:

l   To calculate the thickness of a sheet of aluminum foil and express the answer in terms of proper scientific notation and significant figures

Supplies:

l   3 rectangular pieces of aluminum foil

l   Metric ruler

l   Centigram balance

We measured the length and width of the aluminum foils using metric ruler, and measured the mass of aluminum foil using centigram balance. We can calculate the volume of aluminum foils by using D=m/v. after we find the volume, we can calculate the thickness of aluminum foils by using V=LWH

For example:

        D=2.70 (g/cm3)

        M=0.98±0.01 (g)

        Length=15. 47±0.01 (cm)

        Width=15.14±0.01 (cm)

V=m/D, 0.98g/2.70(g/cm3)= 0.36cm3

H= v/LW, 0.363/(15.47*15.14)cm = 1.55*103cm

%Experimental error:

Accepted value= 1.55*103cm

｜(1.55*103cm)- (1.55*103cm)｜/(1.55*103cm)*100%= 0%

So our measurement is accurate and precise, because it’s 0% off to the accepted value