Obtain a small grinding wheel or a piece of a large wheel. (a) Using a magnifier or a microscope,…

Obtain a
small grinding wheel or a piece of a large wheel. (a) Using a magnifier or a
microscope, observe its surfaces and compare them with (b) Rub the abrasive
wheel by pressing it hard against a variety of flat metallic and nonmetallic
materials. Describe your observations regarding the surfaces produced.

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