Sprenkle,+Ryan

I already knew a little bit about hydroflouric acid before reading the article, like the fact that its a strong acid that, when it comes in contact with skin, seeps through and eats away at the tissues from the inside out. However, I was under the impression that the acid spread throughout then body with greater hast. I thought that if you touched it you were basically dead because it would spread through the body fast. Clearly I was incorrect. I was intrigued to learn how common hydrofluoric is. It shocks me that such a deadly substance would be so readily available (granted there was a warning label on the bottle). I found the treatment for the mans burns interesting. Everyone knows Calcium is important to health, but I found it cool that a Calcium injection would react with the acid and null its effects to the body.
 * An Invisible Fire**

Ryan, OK. Looks good. HF is actually not a strong acid - chemically speaking. 5 stars. MW

I found this article rather interesting. I don't know to much about the Greek language but I do enjoy learning about the Ancient Greeks and their culture so I liked the article. The article made some extremely important points. The most pertinent being the origin of the word //chemistry.// The word //chemistry// has two possible origins. The first being the word //khem//, which represented the land of Egypt and the mysterious arts its people practiced. It could also come from //cheo//, a word meaning "I cast or pour." I also found it interesting that often times you can figure out a general meaning of what many of chemistry's terms mean simply by breaking them down (which thinking about it now actually makes perfect sense). Another important bit of information in the article is many of the simple and most common chemistry terms, like //atom//, //ion//, and //isotope// all have actually meanings. They were chosen for specific meanings. I pretty much assumed that someone just decided to name an //atom// an //atom// just because they liked the sound of it (or something like that).
 * Influences of Ancient Greek on Chemical Terminology**

Ryan, It is kind of an "aha moment" when one discovers that words have deeper meanings! Good Job! 5 stars. MW

I really don't know too much about Einstein, so I found this article very informative and quite interesting. Obviously the three most important parts of the articles are the three theories the article is about. The first being the Photoelectric Effect. The Photoelectric Effect is when electrons bounce off of a metal surProxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 ce. This is used for a ton of things now days, from motion senors to N.O.D. (night vision goggles). The next theory is the Atomic Theory. This theory suggests that even the smallest particles have a great effect of larger objects. Einstein wrote many papers on this idea and eventually became one of the founders of atomic theory (I never realized this. I thought it was accepted long before). The final point, in my opinion, is the most important of the article. It is the Theory of Relativity. This theory says that time is a relative thing. This is so important because this theory affects any long distance space travel we will make in the future.
 * Einstein's Miraculous Year**

Ryan, I thought the atomic theory was pretty well accepted before Einstein also. Good reflections! 5 stars. MW

This article was quite interesting. There were several things that were clarified but it also brought up another question. The first important point of the article is basically the first point the article makes. It talks about the reason why ice makes it dangerous to drive. It explains that friction is lost on ice, which decreases traction. This makes you slip. However, thing brings up a question. Snowmobiles have difficulty on the ice because of the friction between the treads and the ice. The causes heat and melts the ice, slowing the snowmobile. So my question is why is friction decreased for cars, but increased for snowmobiles? The second VIP is about how salting the roads helps eliminate ice. This is through freezing point depression. The salt molecules break into ions and the water molecules in the snow and ice form up with them, lowering the freezing point of the water. The MVP, the most important point in the article is about the current tech used in the industry. It tells of the great leaps engineers are making in the industry. This included ways to prevent road corrosion and making the salt work faster. You can tell the technology is not up to par yet, because sometimes, if the ice is thick enough, the salt will eat through the ice and leave a giant sheet of ice with tiny holes down to the road.
 * Salting Roads**

Ryan, I'm not real sure on the snowmobile thing. I think they are designed for snow, not ice. Anyway good thoughts and good post! 5 stars. MW

1. How much of the Chlorine used turns to gas? Is it enough that it must be dealt with regularly? Apparently the amount of chlorine gas formed by Chlorinating pools is very low and it only becomes a problem with indoor pools if they are not well ventilated. However if the gas is allowed to build up, a toxic cloud will form over the pool which is incredibly dangerous.
 * Pool Chemistry**

2. Even though we have an indoor pool, would you be prepared to deal with a problem such as algae? Jason said that they have no issues with algae, and from the research I've done, it seems as though many times algae can be dealt with by merely increasing the Chlorine levels. So i would assume that the school does not keep any chemicals to deal with the problem because it's highly unlikely and easily dealt with.

3. Do the terms "calcium hardness" and "stale water" have any correlation? These terms do not have any relation what-so-ever. Calcium hardness refers to the levels of calcium in water, while stale water is when water remains untouched for a long period of time and the minerals in it settle to the bottom. I never actually knew what stale water meant and thought the terms might be similar but apparently they are not.

I actually found this information rather interesting. I really didn't know much about pool chemistry at all. Obviously everyone knows Chlorine is used in pools, but I always questioned why. It turns out that the Chlorine itself does not do much, but the ions it forms attack bacteria. I find it rather amusing that the same elements used it chemical weapons are used to keep people healthy.

Ryan, Well done! Yes a little chlorine is a good thing - a lot of chlorine, not so much! :( 10 huge stars. MW

We learned quite a lot of what this article said in class, however it did expand upon it further. I already knew that cars have the issue of rusting, especially during the winter when the roads are covered in salt. I also knew that the paint on automobiles, as well as buildings, helps prevent them from rusting. Obviously, if rust was the only issue then metals like gold would be good choices. But given its expense and the softness of it, it is not a good candidate. Some cars are made of other materials though. I wasn't aware the Delorean was made of aluminum but I do know that aluminum and carbon fiber are commonly used in high class sports cars because they are light and do no rust. However they are expensive and difficult to make. Obviously rust is a problem everyone deals with, but I had no idea $280 billion were lost each year because of rust. I know that the military plans on using B-52's for the next 40 years or so, and that rusted husks of aircraft are in large bone yards, but for some reason it never occurred to me that rust would be a big issue. It makes sense that the military is one of the largest investors in anti-rust research. I was very interested to learn that paints are being developed.
 * Flaking Away**

Ryan, The DeLorean is actually made of stainless steel. I wonder if the bodies of Nascar cars are made of aluminum and carbon fiber like the sports cars you mentioned. 5 stars. MW