Wingert,+Christian

Motion Sensors Coming into this article I already knew that some motion sensors have a beam of light that goes to a photo sensor. When the beam of light gets blocked that is how the sensor knows somthing is there like the safety sensor on garage doors. I also knew that Einstein is most famous for E=mc2 but also for his theroy of photoelectric effect because we learned that in class. The last thing I knew before reading the article was that humans and animals give off infrared radiation (IR) which sensors and night vision goggles can pick up. One thing I learned from reading this article was that a device might send out a pulse and use sensors to monitor the reflection patterns. The motion is then detected when the reflection pattern changes. I aslo learned that photo sensors that were used in the motion detectors rely on lights ability to make an electric current known as the photoelectric effect. When the light of sufficent energy is shined on a given surface it causes electrons to be ejected. The last thing I learned was that Rattlesnakes have "pits" on the sides of there heads which allows them to detect any IR nearby which is why they can sneak up on prey without them even knowing.

Christian, Once again a good post! 5 big stars. MW

Crude Oil Video In the video I learned that they have to separate the solution by using the distillation method. I already knew what the distillation method was and how it happened because we learned in class today. Crude oil would be useless if the solution was not separated. To start out they had to put it in a tube and have it heated by a Bunsen burner or electric burner. Then the solution will heat up, reflex, and condensate traveling down a long tube. Then the finished solution would fall into a flax just how we learned it in class and what the demonstration showed that we did in class. Another way you could separate a mixture is using the filtration method but that wouldn't work for this solution they showed in the video. You would put the solution in a funnel and it would trap the solid in it and pour the liquid in a flax.

Christian,

OK. Looks good! BTW it is reflux - not reflex and flask not flax. :) 5 stars. MW

The article I read up about was the Diet Coke and Mentos article. I already knew that if you stuck a Mentos candy into the Diet Coke bottle it will explode. I also knew that a newly opened bottle of soda will loose its "fizz" and be completely flat after a couple of hours. The last thing I already knew coming into this article is that putting an ice cube in a room temperature cup of soda will make it go flat quickly. Something I learned is that small uneven surfaces give the molecules a place to come together and form into bubbles. I also learned that if the walls of a soda can or bottle was rough at al the soda would spray everywhere right as it was opened. The last thing I learned is that a Mento is actually really rough and bumpy which would do the same as a rough wall on a soda bottle or can. When it sinks to the bottom, the outrushing gas will bring a fresh plume of gassy soda in contact with the Mento and make more gas.

Christian, Well written post. Looks like you learned some interesting things. 5 stars. MW