Interface and colloid science is an interdisciplinary intersection of branches of chemistry, physics, nanoscience and other fields dealing with colloids, heterogeneous systems consisting of a mechanical mixture of particles between 1 nm and 1000 nm dispersed in a continuous medium. A colloidal solution is a heterogeneous mixture in which the particle size of the substance is intermediate between a true solution and a suspension, i.e. between 1–1000 nm. Smoke from a fire is an example of a colloidal system in which tiny particles of solid float in air. Just like true solutions, colloidal particles...
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To edit units, some editors use \mathrm.
eg.\mathrm{m/s}$\to\mathrm{m/s}$
Also some use \text.
eg.\text{m/s}$\to\text{m/s}$
Recently I edited a post using the first method, and I found that someone had suggested an edit with the second method. Which one should we actually use?
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I hate this letter $\xi$. I dont understand why we have to use this symbol. I mean there are many greek letters easier to draw. Do we use this letter in order to imply the level of difficulty in the topic it appeared? Anyway, I always wanted to ask how to draw this letter. Should I first draw an ...
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