a Is the static coefficient of friction between two surfaces

a) Is the static coefficient of friction between two surfaces an extensive or intensive property? Explain why.

b) Is the hardness of 1040 steel an extensive or intensive property? Explain why.

Static coefficient of friction depends on the contacting material it don\'t depends on size of sample So it is intensive property

Hardness is a material property and is independent of size of sample So it is also intensive property