Tran,+Dat

Motion Detector Response-

I knew that one of the possible triggers of a motion detector was when an object passes through a light source. I also knew about Einstein's theory of relativity and the pit viper's use of infrared to detect their prey. On the other hand, I had no idea that radar guns used radio waves (hence, it's name!). I also did not know that there are chains of chemical reactions in your eye just so you have vision. Finally, I also did not realize that the hertz was named after the German physicist Heinrich Hertz.

Dat, OK. Pretty basic but you covered the assignment. 5 stars. MW Helium and Sulfur hexafluoride Response-

After reading the articles, I noticed that there were things I already knew. Buoyancy, the pressure exerted by molecules as they collide with surrounding surfaces, and the escape of helium from balloons were things known to me. There were also other surprising things I did not know. The fact that everything weighs more than thought to be and that a fun experiment with helium or sulfur hexafluoride can actually suffocate you and knock you out was very surprising. I also did not know that a balloon filled with sulfur hexafluoride will grow in size instead of deflate!

Dat, Not such a fun experiment after all! MW

Dust Explosion Response-

It's surprising how something so small like dust can cause so many deaths and injuries the past years. The size of dust might make it seem harmless, but the smaller particle, the less energy needed to set it on fire. A small reaction is enough to ignite the dust and spread it to even more dust, which is likely found in industrial factories like the sugar plant destroyed in this article. The sight must've looked like the lycopodium combustion demo seen yesterday, but on a much stronger, and deadly style.

Dat, Good imagery. 5 stars! MW

Mole Day Response-

Now that I know the useful qualities and awesomeness of the mole, it was kind of sad to see Avogadro didn't really get the recognition he deserved. Avogadro was too sloppy in his presentation and it was only after he died that his friend, Stanislao Cannizzaro, showcased his work (and might have gotten some glory for the genius proposal). The discovery of the mole method helped so many new scientists discover and develop many other contributions to the field of chemistry. At least we now show Avogadro some praise by singing the mole song or telling hilarious mole jokes.

Dat, True. Avogadro gets his due now. he probably needed a good manager! 5 stars. MW %3Proxy-Connection: keep-alive Cache-Control: max-age=0 r> "Where do Elements come from?" Response-

This article was very interesting and mind-blowing to me. I was very surprised to see that humans were able to witness a rare event like a supernova, but I guess the number of stars in the galaxy can help explain that. More than a cool implosion of a star, these blasts help spread basic elements (mostly #1-26) across space. Stars are mostly made from hydrogen, the most basic element, and the atoms inside are continually squished and bonded to create more complex elements from just the basic hydrogen atom. Therefore, the scattered atoms end up creating everything around in in us. Other methods of creating elements are the "S" (slow) and "R" (rapid, only during star explosions) processes.

Dat, OK. Solid post! 5 stars. MW

Redefining the Kilo Response-

I was led to believe that perfection in pretty much anything was impossible. Now, I just learned that there are perfect examples of the most accurate kilogram ever, at least for a while. The copies of the perfect kilogram have lost about 50 micrograms over a couple of years, and it’s causing a panic over complicated equations and theories on creating a new perfect kilogram. It sounds kind of silly, but I can see why it is needed. Chemistry is an area where the word //close// isn’t good enough.

Dat, People like to have "perfect" standards of measure, this gives all measurements validity and meaning. MW

Crude Oil Response-

Crude oil was shown to have gone through fractional distillation, and it waProxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 20interesting that multiple products could be made. I was surprised to see how small the end product really was. Kerosene, asphalt, and other things are created with the various heatings of the crude oil. At larger quantities, factories and%Proxy-Connection: keep-alive Cache-Control: max-age=0 facilities are required to be productive at a big scale. The process that happens inside the complicated piping and machinery is still fractional distillation. In a single container, there are multiple pipes that divert the products that are created when heated to a certain temperature.

Dat, Good summary. 5 stars. MW

Harry Potter Article Response-

It was surprising to see that “magic” from the Harry Potter world can be attainable in the Muggle, or regular people, world. An example would be colored flames. Sprinkling boric acid powder into a flame can create green flames, and purple flames can be created with potassium and oxidations of zinc and other elements. However, feats like black flames are not yet possible for the chemistry world. An easy project to do is to make color changing or invisible ink. These can simply be%