Rotell,+Joshua

Could Cell Phone Radiation Damage Our Brains?

This article struck my eye because I have always heard that if you talk on your cell phone, there was a possibility of being hurt by the radiation and that it could lead to brain cancer. But after reading this article, it has reassured me that it is extremely unlikely that cell phones are linked to brain cancer/damage. This article was very informational, and I liked how it included all of the information about the different rays and how cell phones heat your skin by a fraction of a degree, which is less than if you were exposed to the sun.

Josh, Direct and to the point! I agree there are a lot more scary things to worry about then cell phones causing cancer. 5 stars. MW

I found this article to be very interesting and unique in a way. With only around 90 or so exact kilograms, we do not have as many exact weights as I thought, and I didn't know it was so important to keep these intact. But when I thought about it, if we just let them out without guarding them, they might get damaged or get effected in the wrong way so it was different from what it started out to be, and that could effect everyone because then we don't know what the actual standard weight is. Another thing aobut this article which was interesting is that the SI unit for temperature is Kelvin, which I thought was interesting because I always thought that Celius was the SI unit for temperature, but then I thought back to the paper we got and realized that Kelvin was used more for scientific and had easier to remember temperatures. Finally, I found it weird that the kilogram is the last of the SI base units that is still defined by a physical artifact, and that related to when we learned about the meter is now measured by a length of a certain wave, which I found to be pretty neat.

Josh, Good post. Looks like you found some interesting points in this article. 5 stars. MW

I found this article on motion sensors extremely interesting, and that there is a lot to motion sensors that I didn’t know about. One thing was that there are different types, I always thought there was one type and that was with a infrared sensor/light. Also, another interesting thing about this article was that some animals have infrared sight as well. The rattlesnake has pits on the side of its head, which I find really cool because it will help them when they are on the prowl for food. Finally, I found that it was cool that some objects can go right through sensors and it wont even effect the beam at all.

Josh, OK. A little bare bones but full marks. MW