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surfaces

/surfaces-quotes-and-sayings

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But it wasn't the right season to lift off. Not yet. I sat in my apartment and looked out over the city, and I just didn't feel any passion to write about the place. I didn't give a damn about local politics; I wasn't moved by the issues. I missed home. And I was frustrated by people who actually thought the world was a centre and that centre was here. __he world's a sphere, everyone,_ I wanted to say. __he centre of a sphere doesn't lie on its surface. Look up the word 'superficial', when you have a chance.

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I would like to start by emphasizing the importance of surfaces. It is at a surface where many of our most interesting and useful phenomena occur. We live for example on the surface of a planet. It is at a surface where the catalysis of chemical reactions occur. It is essentially at a surface of a plant that sunlight is converted to a sugar. In electronics, most if not all active circuit elements involve non-equilibrium phenomena occurring at surfaces. Much of biology is concerned with reactions at a surface.