Tranchitella,+Dominic

I read the article about coke and mentos. Now i was intrested in this because I saw the video where the guy put the mentos in the coke and it exploded. The reason that it explodes is because of Nucleation sites. What they are are basically dimples or rough edges that the CO2 form on. The CO2 gathers on the rough edges of the mint mentos when they are added to the Coke. This concentrated amount of CO2 wants to expand, and does so. That's what causes the carbonated explosion.

Dominic, OK. 5 stars. MW

=Redefining the Kilogram= Now the gram is a unit of measure, and is the standard in the SI. In order to make sure everything matches and is the same, there is a standard weight. Now this weight has lost 50 µg. (5x10^ -6) over the course of it's usage. Now though technically that's not a lot on our scale, it does mean one thing: Avogadro's constant might instead become Avogadro's number. What's intresting about that is that it is no longer an abstract term -such as sine or tangent- but rather an actual number. The most important part of all of this is that the concept is now much easier to understand for someone like a student.

Dominic, Decent summary but what is you MVP? 4 stars. MW

=Crude Oil=

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The separation of the crude oil is preformed by distilation. The Hydrocarbons are placed in a fractionating column that is carefully heated. The lower boiling point molecules vaporize and rise up the column out of the sidearm where it condenses down a dripping tube. The most important part of this is that without separating the oil at the different temperatures, it would stay as unrefined crude oil. When it is unrefined, it is useless. This also can relate to what we are doing because it is one of the separation techniques that we are learning about.=====

Dominic, OK. Kind of basic but you got the idea! 5 stars.MW

=Motion Detectors=

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Motion detectors are commonly used things, be it a grocery door opening or radar guns. I had always thought that they were just operated by people in a small computer room, but actually, they all detect photons. The photons are at different wavelength compared to visible light, and can't be sensed by our eyes. We can relate this to what we're learning because we are currently learning of the different types of wavelengths and how they are measured. Another thing we can relate this to is our eyes, because they are exactly like motion detectors. The only difference between them is that our eyes pick up on visible light, whereas motion detectors use ways such as broken light paths, echolocation, or infrared lights.======

Dominic,

=Where do Chemicals Elements come from?= Elements are formed in stars. Every element was created from Hydrogen atoms through fusing to a higher nucleus. Elements get released into space after supernovas.

Dominic, Looks good. 5 stars. MW

=Sugar: An Unusual Explosive= This article is very interesting article. I found it interesting how sugar was the source of the explosion. I also found it interesting how the smaller the particle’s surface area, the higher chance of a chemical reaction happening. These two pieces of information helps lead to how the sugar fueled the explosion, which is the most interesting. The sugar has been ground into dust, and was in the air, due to not being properly filtered. A spark from the machine combusted the air, and caused the explosion that spread all over the factory.

Dominic, Any relevance to our class? 4 stars. MW

=Helium Balloons= Helium balloons relate directly to what we’re learning in chemistry because it is telling us about the properties of gases. An interesting point about this is how technically we weigh more because the air’s buoyancy makes us weigh less. Gases also expand to fit their container, so they spread out more, as you get higher up. Another point that is most important is that density is the biggest contributing factor to the helium balloons floating. Density acts with gravity and buoyancy because the less density, the more buoyancy, and the more buoyancy, the higher the balloon rises.

Dominic, What is your MVP? Be sure to clearly define it. MW