Friday, January 11. 2013
I think of all my geeky t-shirts, this one is my favorite. For me these eight little words are not just chuckle-worthy, they say so much more than what is apparent.

What is entropy? Without going into a thermodynamic treatise on usable and unusable energy, I will say that entropy is simply the disorder or randomness in a system. The higher the entropy the more disorder there is. Without adding anymore energy, the entropy of a system will increase but not decrease. For example, if I knock over a glass and it shatters on the floor, the entropy has increased. The glass is very disordered laying on the floor in a bunch of pieces. The glass will never spontaneously reassemble. That would require a decrease in entropy. The only way to decrease the entropy of the glass is to add energy: the energy required to collect all the pieces and glue the glass back together.
The Second Law of Thermodynamics states the entropy of the universe is increasing. As time goes on, the universe is becoming more and more disordered. Hence the "Entropy. It ain't what it used to be."
But entropy has theological implications. If the universe is becoming more disordered, then at some point, in the beginning, it was infinitely ordered. In the beginning. Perfect order. I don't know about you, but to me that screams, "Creator!"
Dr. Robert Jastrow, in his book God and the Astronomers, wrote:
"Theologians generally are delighted with the proof that the universe had a beginning, but astronomers are curiously upset.... For the scientist who has lived by his faith in the power of reason, the story ends like a bad dream. He has scaled the mountains of ignorance; he is about to conquer the highest peak; as he pulls himself over the final rock, he is greeted by a band of theologians who have been sitting there for centuries."
Friday, December 14. 2012
So this t-shirt is a bit more obscure than my others.

This is the heat equation. Hence the "HOT." "q" is the energy, in the form of heat, either absorbed or given off by an object. "m" is the mass of the object. "delta T" is the change in temperature of the object.
"c" is a special variable called specific heat. Specific heat is intrinsic to a substance. It describes how easy a substance is to heat up. Metals increase their temperature fast with very little energy input. Everyone who has touched a metal spoon that has been sitting close to a burner has experienced the fact that metals have a low specific heat. Water on the other hand has a high specific heat meaning that it takes a lot of energy to raise the temperature of water. Anyone who has paid to heat a swimming pool or waited for a pot of water to boil has experienced the high specific heat of water.
So the amount of energy (q) needed to change the temperature (delta T) of an object depends on the object's mass (m) [a bigger object needs more energy] and its specific heat (c) [how easy the object is to heat up.]
In the immortal words of Paris Hilton, "That's hot!"
Friday, November 30. 2012
I got this one for all the ladies that come over to my house for tutoring and are in a emotional panic over their chemistry class. (Have you noticed the camera on my smart phone is scratched? I got my hubby's cast-off with the jacked up lens. At least it is a phone, and it's smart.)

From girls, to teenagers to grown women, I have seen more tears shed over chemistry than any other subject. And if there is one thing that will guarantee failure in chemistry is panic; the outward sign of that panic is tears. So if you want my help, the tears have to cease. Otherwise, learning cannot continue. Tears = total brain shut down.
It is not that women are bad at chemistry. I actually find that females are better at the details required than their male counterparts. They just have to believe that they can do it.
I have written about this gender difference in detail at Creative Minority Report. Here is an excerpt:
Faced with a difficult multi-step problem, males and females attempt to solve said problem with divergent styles. A male will skim the problem and immediately start furiously writing, almost as if it is a race. He then circles his answer and looks at me with a proud look on his face. At this point, I burst his bubble and tell him his answer is wrong. It is wrong because he did not read the question carefully and so instead has the right answer for a different question entirely. (I believe this mental process is the same one that causes men to be reluctant to read directions or consult a map.)
A female will read the question carefully, consider it, and consider it. She knows exactly what the question is asking. She can usually see the first step in her head, but after that she does not know where to go next. Since she cannot easily see the destination, she begins to panic. Her lip starts to quiver and her eyes begin to tear up. The problem never gets solved and all she has for her trouble is a blank piece of paper with a tear-stain on it. (I have experienced this phenomenon more times than I would like to admit so I immediately spot it in those women I work with.)
If I can get her to take just one step in the problem, she is usually more likely to get the question right than her male counterpart who didn't bother to read the question properly. That first step, even if it is in the wrong direction, illuminates the next step, and then the next and finally the girl gets to the destination: the right answer. But she has to get over her emotional response to a difficult question and take that first step.
Friday, November 23. 2012
Today's geeky t-shirt blogging is in honor of the new James Bond movie Skyfall.

I love all my t-shirts but I this one because of its "sophistication." In chemistry, there a laundry list of different interactions between atoms and molecules. Two of the most commonly known are ionic bonds and covalent bonds. (You should have learned about these in your high school chemistry class.)
When an atom of metal and an atom of a non-metal meet, the metal happily hands over an electron or two (or three or four) to the non-metal which greedily takes them. This causes the metal atom to become a positively-charged ion and the non-metal to become a negatively-charged ion. The metal and non-metal are then attracted to each other because of their opposite charges. This attraction is called an ionic bond.
A covalent bond happens when two non-metal atoms meet. Both want each other's electrons, so like toddlers fighting over a toy, the only way both non-metals can be happy is if they share electrons. This sharing of electrons between atoms is called a covalent bond.
So an ionic bond is one where electrons are taken and a covalent bond is one where electrons are shared.
Hence the "Taken. Not Shared." Funny right?!?!?
Friday, November 16. 2012
So being the true geek that I am, I have a collection of geeky chemistry t-shirts. I heart chemistry so much that I have quite a few chemistry related shirts and an even longer wish list of ones I want to possess. I thought as a light-hearted post on Fridays, I would share them with you. Here is the one most people like the best. I like to wear it to the gym:
But true to the chemistry teacher in me, I cannot simply leave you with that little chuckle. I have to explain why this is so funny. In the atom, there are protons, neutrons and electrons. Relatively, protons and neutrons are big. Electrons are very, very, very small. Practically negligible. So really it is the protons and neutrons that give an atom most of its mass. So adding a proton would significantly increase the mass of an atom. (Technically, adding a proton would turn it into another element entirely, but I digress.)
So the answer is, "Yes! That proton DOES make your mass look big!"
(Have I mentioned how embarrassed my children are of me?)
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