1)What is the brittle material inside a pencil that helps us write on a paper?
2)Rough surfaces have more microscopic Hills and valleys then smooth surface. An ice cube slides more easily on floor then eraser why do you think this is?
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Answers
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1) lead is present inside the pencil.
2)As eraser has more friction and roughness than the floor.
2)As eraser has more friction and roughness than the floor.
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2
Explanation:
1.lead which is made up of graphite.
2.As compared to ice eraser have more roughness and friction. Thats why ice slides more easily than eraser.
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