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# Physics

What enables us to write on the black board with chalk.?

A. Gravity B. Cohesion C. Adhesion D. Viscosity

and why?

Note by Akash Sinha
3 years, 6 months ago

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Adhesion, the chalk sticks to the black board because of that. · 3 years, 6 months ago

thanks for it. · 3 years, 6 months ago

why Viscosity is one of the options ??? · 3 years, 6 months ago

ok forget it but tell me the write one · 3 years, 6 months ago

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