madyrea madyrea

28-10-2019
Biology

contestada

what is a mineral's estimated hardness if it can scratch a fingernail, penny, steel plate, and glass?

Respuesta :

griffins22 griffins22

28-10-2019

Answer:

5.5

Explanation:

Instead, common objects are used as tools to perform the hardness test: fingernail (hardness = 2.5) copper penny (hardness = 3) glass plate or steel knife (hardness = 5.5)

Answer Link

shyvizzle05 shyvizzle05

28-10-2019

Answer:

5.5

Explanation:

Answer Link

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