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Physics 11 Online
OpenStudy (anonymous):

you have two minerals, one with a hardness value of three and the other with a hardness value of 6. describe the procedure for determining these hardness values

OpenStudy (anonymous):

Hardness is measured by the resistance which a smooth surface offers to abrasion. The degree of hardness is determined by observing the comparative ease or difficulty which which one mineral is scratched by another.

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