Science, asked by lonezeia666666, 18 days ago

Can coal be used to write on blackboard? Why? Why not?

Answers

Answered by raj873719

Answer:

A chalk is softer than slate so it can be used for writing while coal is harder than slate, so it can cut or mark (scratch) the board . So, a chalk can be used and but not a coal to write on the board.

Explanation:

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Can coal be used to write on blackboard? Why? Why not?​

Answers

Can coal be used to write on blackboard? Why? Why not?