急!!!!!!!!!關於Chem的問題

2007-11-01 12:50 am
我想問有冇人知strong同hard有咩分別呀?????(physical properties)

回答 (1)

2007-11-01 4:43 am
✔ 最佳答案
"Hard" is a material just has very high tensile modulus / tensile strength but may not has high elongation at fracture i.e. brittle. E.g. Tungsten
"Strong" is a material has high tensile modulus / tensile strength and high elongation at fracture i.e. have some degree of deform before fracture. E.g. Steel
參考: Myself


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