Topic

classrooms

2 articles matching this topic.

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A piece of chalk pressed at a sharp angle against a green blackboard

Acoustics & Friction

Why Does Chalk Squeak on a Board?

physicsacoustics

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A cloth wiping a clean streak through colorful dry erase ink on a white board

Polymer Chemistry

Why Do Dry Erase Markers Wipe Off?

chemistrymaterials science

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