Modali,+Karthik

Sorry for the last second delay Mr. Williams, but here's my post and response to the Motion Detectors article! This article actually kept me interested because I have always wondered how motion dectors sensed movement. One thing that I knew before I read this article is that some animals use "motion dectors" to find and get their prey such as some forms of snakes or bats. Another thing that I knew about was one of, if not the most, Einstein's most famous theories/ equations. That was the equation E= mc squared. This was part of the relativity theory, one of the things I learned after reading this article was that Einstein won the Nobel Peace Prize for the work he did on the photoelectric effect, not the relativity theory. A third thing I knew before reading this article was that the eye is like a photo sensor and it picked up the colors of R.O.Y.G.B.I.V and depending on the light it saw, images are genarated in our head. Another thing that I learned and did not know whas that all warm blooded being (including humans) gave off some sort of raditation no matter how little. This raditation then sets of some motion detectors because there is a difference in the temperature and radiation levels in the room. A last thing I did not know that I learned was that no matter if it is radiation, heat, and/or light itself, all motion detection is set off by the electrical currents that travel in light. The thing that I found most interesting in this article was that there are more than one way that motion dectors work and do there job. I used to think that all that happened was it just sensed an object's or persons' movement and set off. Guess I have been wrong. This article really got me thinking about motion detectors and radiation and how much they interact.

Karthik, Great job! Very thorough. 5 stars. MW

One of the thing I didn't know is that crude oil is useless as is. I thought that you could just use that oil straight from where you get it as fuel. The process it has to go to first is called fractional distillation. This process separates the crude oil into other separate hydro-carbons. Different methods are used because different hydro carbons boil at different levels. The thing that is relevant to our class is because we did and used distillation in our demo today, to separate chemicals from pure water. One thing I found interesting is that crude oil can be made into several different types of oil that can be used in different ways.

Karthik,

Looks good! 5 stars. MW

My article was about tattoo ink and how the different kinds have effects on your skin. The three things that I knew about this topic and facts in the article were that tattoo ink can be harmful for your body, it is very hard to get removed from your skin, and there are different kinds. It can be harmful because of chemicals in some kinds of tattoo ink that can possibly cause cancer. Now, the ink makers are generating new kinds of ink that can be more easily removed and are less harmful on the dermis. One thing I didn’t know what that phosphorus could possibly lead to cancer. Another thing I didn’t know is that a large part, if not the biggest, of tattoo ink making starts with chemicals and minerals such as titanium dioxide, zinc oxide, or lead carbonate as a base for the color white. The most interesting thing that I didn’t know was that the Food and Drug Administration does not monitor or see which pigments are put in the tattoo ink by the manufacturer. Therefore, you do not know what you are putting in your skin, besides the fact that its ink. Even though tattoos can potentially be harmful, new research and advances are allowing tattoos to be cool and safe for our skin.

Karthik, Looks good. I think you have to chose wisely if you decide to get a tattoo. 5 stars. MW