Hoover,+Joshua

Tattoo Ink
While reading the article I was very surprised to find out that one in every eight Americans has a tattoo. I also found it interesting that tattooing is the fastest growing retail sector. Tattooing has many things in common with chemistry. To achieve the different pigments in the ink they can use a variety of things, like minerals, organic materials, or even plastic based coloring. Chemistry is really helping with the advancement of tattooing. Companies are working on removable ink. They accomplish this by producing ink that uses a drug grade colorant, and a polymer bead. After one hit of a laser this bead breaks, releasing the color which is then absorbed by the body. As you can see, chemistry is helping the advancement of tattooing technology greatly. Josh, Yes innovations are everywhere, particularly if they can make money! MW

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I learned that their are different materials in crude oil that are collected through the process of distillation. The different materials are collected from using different temperatures because the different fractions have different boiling points. So they build the temperature up to collect the factions gradually, so this process is called fractional distillation. Factories do this same process but on a huge scale. There are five main fractions that are broken down but they could brake them down further if they chose to do so. This relates to class because we have been learning about the different ways to separate materials.===== Josh, Well done. 5 stars. MW

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The kilogram is one of the seven units of measurement in the international system of units. In the article I learned that there are perfect examples of what a kilogram is, but over the last couple years the standards for the kilogram have lost 50 micrograms. This is causing a panic in the science community. These errors can lead to miscalculation in a field that accuracy is of the utmost importance. Therefore, it’s extremely important that a perfect example of certain weights exists. Without this, all measurements are going vary slightly. This is why the International Bureau of Weights and Measures is recomending that the kilogram be redifined. I think they should go about this in a different way. This would be very difficult and may cause more harm then good. Josh, I think you're right that it will cause some issues but perhaps the change is best for the long run? MW ======


 * Where Do Elements Come From? **

Many of the scientists today believe that the elements found on earth come from space. Scientists believe this because of the stars ability to conduct fusion in there core, and this fusion allows them to produce elements up to the mass of iron. When the core of that star begins to create iron, it begins to implode from all the pressure. The pressure is so powerful it collapses the star and pushes outer parts of the star into space. This creates a supernova, during a supernova the temperature is so hot it is able to create elements that are heavier them iron. In conclusion, it is believed that every element, except hydrogen, on earth reached us from the clouds of supernovas.

Good cataloging of the main points. 5 stars. MW

=MOLE DAY=

The mole was first discovered by Amadeo Avogadro. But he wasn't credited with the discovery until after he passed away. Wilhelm Ostwald supposedly coined the name mole around 1900. The number mole has multiple sig figs, but near the quantity of pi. Pi is a function, but mole is actually a weight, which explains the difference in the size of number. On May of 1991 The National Mole Day Foundation was founded. I would never have imagined that a weight would have its own day. The mole of a substance can be found through its atomic mass number. A substances atomic mass number is the weight in grams of that substance as a mole. You can purchase a lot of different types of mole merchandise on the website. I never new a measurement of weight would have such a following.

Josh, Good comments. It must be somewhat important to have such a following. No? 5 sun song stars! :) MW

=Dust Explosion= I found this article really interesting. I would have never imagined that things that aren't normally flammable are extremely flammable when they are ground up into a fine powder. Dust explosions usually occur from something else exploding. The first explosion will stir up the dust, which mixes with oxygen, become flammable, is then lit by the first explosion, and often produces a much bigger explosion. For the most part the smaller the particle the more surface area is available relating to weight. This means less energy is needed to start the explosion, and will then in turn burn faster. The main culprit of this is plants; plants have large quantities of these particles. So if these plants are being moved around in a factory, over time they will settle on surfaces of the factory, which then can be later stirred up and can lead to a dust explosion. Some factories have been known to have a half inch of this dust settled on the ground. You can imagine how intense that explosion would be.

Reason, That mixing is what we are talking about in class - stoichiometry! 5 sugar bug stars MW

**Sulfur Hexafluoride Article** Things I knew 1. I knew that Sulfur Hexafluoride consists of one sulfur atom, and 6 fluoride atoms. 2. I also knew which gases were the noble gases. They are Helium, Neon, Argon, Krypton, Xenon, and Radon, which are the last column in the periodic table. 3. I also knew that the higher up in the atmosphere you go the more the pressure decreases.

Things I learned 1. I didn’t know that the reason that helium filled balloons go limp is because the helium molecules leak out, and nitrogen atoms come in. 2. I didn’t know that sulfur hexafluoride would make a balloon expand over time. 3. I didn’t know that sulfur was used in gun powder. = = Reason, Looks good. I like the chem facts that you picked out! 5 helios stars! MW **

**Motion Detectors** 3 Things I Knew 1. I knew that they use sensors that send out echoes, and when the reflection pattern changes they send an alarm off. 2. I knew that they use light source sensors that uses a light and a sensor, and when the light gets blocked it sets the alarm off. 3. I also knew that they use infrared sensors that monitor the temperature of a room, and when a human comes in a room it changes the temperature if the room and sets the alarm off. I basically new all the different types of security sensors. 3 Things I Didn’t Know 1. I didn’t know that radar guns used radio waves. 2. I never realized that chemical reactions are going on in your eyes that give you your vision. 3. Finally, I never would have guessed that high intensity low frequency waves can’t move electrons, but low intensity high frequency beams could.

Josh, Well done! I'm not so sure about the temperature of the room thing though. Warm bodies actually give off a form of "light". 5 stars! MW