Why does blackboard dry up after wiping?
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Answered by
5
Answer: about the blackboard is as follows:
Explanation:when we wipe a black board with wet cloth , the blackboard absorbs all the water in one go.
Answered by
1
1) The blackboard is not porous, hence it does not abosrb water
2) The blackboard being black in colour, is able to absorb more aomount of heat. Hence, the water gets heated up and evaporate faster.
3) The blackboard has a large surface area for evaporation, which speeds up the process of water eveaporating from it.
I guess you could get your answer :)
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