A. Calculation of Density
Density is a derived unit which is the ratio of the mass of a substance to the volume occupied by that mass. Typical units are: kg/m^{3}, g/mL or g/cm^{3}.
1. Weigh the wooden block you measured in Part A using the balance.
2. Determine the density of wood. Complete Table 2. Include the correct number of significant figures and the uncertainty. Write your final answer in scientific notation. Compare your result to the accepted value. Calculate the percentage error. Comment on the accuracy.
Processing of Results
Table 1: Results of block measurements

Measurement (to nearest mm) 
Uncertainty 
% uncertainty 
Length of block

140 
$\pm $0.5 mm (0.0005 m) 

Width of block

65 
$\pm $0.5 mm (0.0005 m) 

Height of block

23 
$\pm $0.5 mm (0.0005 m) 

Volume (mm^{3})




*Volume (cm^{3})




Table 2: Results for density of wood

Measurement 
Uncertainty 
% uncertainty 
Mass of block (g) 

$\pm $1 (g) 

*Volume of block (in cm^{3}) 



Density of block (in g/cm^{3}) 



Density of block rounded to correct no. of sig figs 



NB. Accepted density of wood is: 0.6 g/cm^{3}. * This row should be the same
Calculate the percentage error: i.e., Percentage error = measured value – accepted value 100%
Accepted value