physics answer

The side length in meters is 10cm/100 = 0.1 m
The volume of the cube is side length cubed = 0.1^3 = .001 m^3
The weight of the cube is density x volume = 8000 * .001 = 8kg
The force of gravity on the cube is mg = 8kg x 10 m/s^2 = 80 N
The area of the cube on the table is 0.1m^2 = .01 m^2
The pressure = F/A = 80 N / .01 m^2 = 8000 N/m^2

Convert to whatever units you need.