Seudónimo Seudónimo

20-01-2017
Chemistry

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true or false, Discovering which of two materials can scratch the other is a way to compare the hardness of the materials

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FireCooking FireCooking

20-01-2017

True, the hardness of all materials in relative

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CutieCutieCutie CutieCutieCutie

20-01-2017

This answer is true :)

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