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ChemisTeaTime

@chemisteatime / chemisteatime.tumblr.com

University of Texas Chemistry notes + science communication resources + news // art
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rudescience

Tumblr user @dameeron mentioned the site cuSTEMized.org to me. After reading the post about discrimination of women in stem.

What Custemized basically is (from the site description) is that:

CuSTEMized is a not-for-profit initiative that encourages girls to envision themselves in STEM by providing personalized motivational books and goodies! Here, you can make your little girl the hero of our storybook, the Little Book of Big Dreams, where she explores STEM careers and how they can impact the world!

I highly encourage you to check it out. It’s awesome and i think it’s great. 

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~ There’s always something to learn from everyone~

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I’ve heard people compare knowledge of a topic to a tree. If you don’t fully get it, it’s like a tree in your head with no trunk—and without a trunk, when you learn something new about the topic—a new branch or leaf of the tree—there’s nothing for it to hang onto, so it just falls away. By clearing out fog all the way to the bottom, I build a tree trunk in my head, and from then on, all new information can hold on, which makes that topic forever more interesting and productive to learn about. And what I usually find is that so many of the topics I’ve pegged as “boring” in my head are actually just foggy to me—like watching episode 17 of a great show, which would be boring if you didn’t have the tree trunk of the back story and characters in place.

Wait But Why, a highly recommended website of knowledge and fun 

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mandacondaa

180 Degrees South  is one of the best travel documentaries I’ve seen in a while, for its thrilling adventures… and also its focus on saving Patagonia. My favorite scene from the movie shows the remains of a society that destroyed itself by using up all of its resources for one obsession: building Moais. 

Replace Moais with energy, and you’ve got the society we have now– the one that slashes the earth to make our lives easier and more comfortable. Dams currently being built in Patagonia destroy ecosystems and uproot indigenous tribes. 

In this age of flourishing technology and groundbreaking scientific discoveries every week, we are often encouraged, as the young adults of the future, to ask, “how?”: 

How can we create a happier, more efficient lifestyle? How can we create the best technology? 

We are seldom encouraged to ask, “should we?”: 

Should we dam rivers? Should we damn Patagonia for our own benefit? Should we consider the resources of future generations, or should we only be concerned about the present? 

Maybe we should consider teaching the latter question in science and engineering if we’re interested in a brighter future

From my other blog

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rudescience

Brownian Motion

Brownian motion or pedesis (from Greek: πήδησις /pɛ̌ːdɛːsis/ “leaping”) is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the quick atoms or molecules in the gas or liquid.

Giffed by: rudescience

Yummy. I love watching this happen when milk --> coffee. 

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Everything in its Place

If I could marry a vintage infographic, I would be down on one knee in front of John Philipps Emslie’s 19th century creations. Simply brilliant.

Especially that volcano.

Found at Lost Type.

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rudescience

Mercury(II) Thiocyanate:  The Pharaoh’s Serpent

Mercury(II) thiocyanate (Hg(SCN)2) is an inorganic chemical compound, the coordination complex of Hg^2+ and the thiocyanate anion. It is a white powder. It will produce a large, winding “snake” when ignited, an effect known as the Pharaoh’s Serpent.  The first synthesis of mercury thiocyanate was probably completed in 1821 by Jöns Jacob Berzelius:

  • HgO + 2 HSCN → Hg(SCN)2 + H2O 

Evidence for the first pure sample was presented in 1866 prepared by a chemist named Otto Hermes. It is prepared by treating solutions containing mercury(II) and thiocyanate ions. The low solubility product of mercury thiocyanate causes it to precipitate from solution. Most syntheses are achieved by precipitation:

  • Hg(NO3)2 + 2 KSCN → Hg(SCN)2 + 2KNO3 

Mercury thiocyanate was formerly used in pyrotechnics causing an effect known as the Pharaoh’s serpent or Pharaoh’s snake. When the compound is in the presence of a strong enough heat source, a rapid exothermic reaction is started which produces a large mass of coiling serpent-like solid. An inconspicuous flame which is often blue but can also occur in yellow/orange accompanies the combustion.

Giffed by: rudescience  From: This video by Nile Red

So rude

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