Question

Name the three types of coal. Give the main uses of any two of them

Answer 1

because feather is lighter than any other object

Answer 2

Explanation:

Other properties, such as hardness, grindability, ash-fusion temperature, and free-swelling index (a visual measurement of the amount of swelling that occurs when a coal sample is heated in a covered crucible), may affect coal mining and preparation, as well as the way in which a coal is used.

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