Nizinski,+Daniel


 * Post 1**
 * 1/24/11**
 * Combustible Dust**

In plants across the United States, combustible dust is a growing issue. In the process of producing goods, some plants are leaving behind dusts that, when combined with fire, ignite, creating a hazardous working environment. Companies should either be researching alternative ways to produce goods, or having better maintenance standards, so the dust would not collect in these plants. The workers’ lives are at risk, and the companies’ plants may explode. This has happened, and most recently in a sugar plant in Georgia.


 * Post 2 **
 * 1/30/11 **
 * Airline Security**

This is a great tie-in to density in everyday life. With suspicion on terrorists growing, security has really started upgrading the technology for ticket buyers' safety. In the visual on page two, it's interesting to see how the machine works and how it sees things. The clothes and the doll's body don't even show up, because it is not the density of what the machine detects. Even more, there are so many security measures in this article, that it made me wonder how many are actually used in airports (the article said that the “puffer” wasn’t reliable, so they won’t use it). With all these ways to protect travelers, it’s amazing that any terrorists get through the system at all. Dan,Neither of these are under the Introduction to Chemistry tab. I'll count your Airline Security post. I've been through that puffer! 5 stars.

**Redefining the Kilogram** It is still unclear to me why that little bit matters. It almost seems like the scales used to weigh “THE kilogram” were off. It is almost as if the kilogram is the same, or could have been measured incorrectly the first time. This relates to our class directly to what the class talked about yesterday. When we were discussing measurements, the subject of the kilogram was brought up, and we were discussing how exact measurements must be. If they aren’t exact to a certain point, some measurements should be deemed invalid. The density of an object must be considered, when finding mass, which, in this case, is the kilogram. No-THE kilogram. This is why volume, mass, and density play into this Chemistry class in general.
 * Post 3 **
 * 2/8/11 **

Dan, Looks good. Yes it must be nice to be known as THE Kilogram! :). Good Job! 5 stars.MW

I know that my family uses these kinds of lights, but I didn’t know exactly how they worked. The only one that I knew about was type A: when an object is in the way o a photo sensor (At least, that’s how our garage door works. It’s really annoying when things fall in the way.). We have a light in our garage that (based off this article) uses type C: warmth. Maybe that’s why it doesn’t always turn on whenever I walk out of the house in a big coat. I know we were learning about electrons in class, which relates to the “photon-electron connection” segment about how the light emits electric currents. That's one way that it has to do with Chemistry class.
 * Post 4**
 * 2/25/11**
 * Motion Detectors**

Dan, Looks good! I see you made a lot of personal connections here! Well done. 5 stars! MW