Nuclear Bombs

     A very cool example of an exothermic reaction is a nuclear bomb. An exothermic reaction is a reaction in which heat comes from the reaction and goes out into the surrounding air.  Nuclear bombs require enriched Uranium, or Uranium 235. Seven out of every thousand of Uranium atoms are Uranium 235. Uranium 235 is very unstable, and when its atoms split a massive reaction takes place. In a nuclear bomb there is a little bit of Uranium in the front and in the back to the bomb shell. The Uranium is the front is pushed into the Uranium in the back by a little explosion. When the two clumps of Uranium combine their atoms separate, and this makes the explosion. Nuclear bombs were developed during World War 2 in a mission known as the Manhattan Project. The world's top scientists were sent to a little town in New Mexico to build the bomb in complete secrecy. The materials needed to make an atomic bomb are extremely hard to get. In fact, the hardest part of making a nuclear bomb is gathering the materials. The United States has spent a lot of money building facilities to enrich the Uranium needed for a bomb, but even in these facilities the Uranium is still very hard to enrich. Nuclear bombs are used today in warfare. They bring massive casualties to a large area, and their target. 

Here is the great video that taught me about Nuclear Bombs. Check it out!

http://youtu.be/E-Ks-Bs0MPM

YouTube. "How Nuclear Weapon Works." Online video clip. YouTube, 18 December 2013. Web. 19 April 2015. 

The Synthetic Jellyfish

Caltech and Harvard Universities developed a jellyfish that is not a jellyfish at all. This creature has been given the name "Medusoid". Medusoid is a very fasinating creature. It looks really cool and it can move similar to an actual jellyfish. Medusoid was created using cells from a rat's heart and silicon. The rat cells were grown onto the silicon, creating Medusoid. Medusoid contracts like a heart when an electric current is sent through the water. If this jellyfish can act like a human heart, medications could eventually be tested on it before they are given to humans. Technology like this could also be used to make things such as a pacemaker that requires no batteries, and more potential discoveries. I believe that Medusoid will lead to many new scientific advancements. If we have found how to make a jellyfish, we could eventually learn how to make more wonderful things. 

Watch this video to see Medusoid in action!

http://youtu.be/gfC3eVjmpfo

CITE   (For both the video and the information) 

Author= Colin Lecher 

Published= July 23, 2012

Read= March 17, 2015

Cite= http://www.popsci.com/science/article/2012-07/video-jellyfish-made-rats-heart-cells-could-help-study-heart-disease

Car Safety

Do you want to know how to keep your loved ones safe in a car? Well here is some information on what keeps people safe in a car. Today, before a crash even happens there are all kinds of things that help distracted people pay more attention to the road. Some cars have devices that stop people from texting and driving, or something that will help the car get back into control when it is swerving around. If a car happens to get into an accident, there are many things that will still protect a person from the force that the coming at them. Today, many cars have crumple zones. Crumple zones are typically found in the front and the back of the car. For example, when a car is hit in the front, the front of the car will crumple, or fold in. These crumple zones are made to absorb some of the force that a crash may bring. Another thing that guards a passenger would be an airbag. Airbags are usually in the front two seats and they can sometimes be found in the back seats. When a car gets into a moderate or severe crash, airbags will pop out at the exact second of the crash and protect the victim's head from hitting hard objects in the car. Another thing that keeps people safe is a seat belt. The seat belt keeps a passenger from flying all over the car in the event of a crash. New techlogy is being developed that will allow a car to know when a crash is about to happen. When this technology comes out, seat belts will be tightened immediately before a crash to keep the victim as secure as possible. All of these things guard us from the insane amount of force that is involved in a car crash. 25g's is the amount of force that the crash would need to place on the human in order to cause death, and most cars can protect us from that amount of force. With more advancements in car safety soon to come, we will hopefully reduce the number of casualties from car accidents in the near future.

http://en.m.wikipedia.org/wiki/Side_collision

For more information go to: http://rightcar.govt.nz/protection-during-a-crash.html

Rightcar. (2011) Protection Systems During a Crash.

[Web] http://rightcar.govt.nz/protection-during-a-crash.html. Jan 2015

Opinion of Tengels: Contacts vs Eyeglasses

     Both contacts and glasses will do the same thing, they will both correct your vision. They will fix nearsightedness and farsightedness. I personally think that contacts are a better option then glasses. Contacts go into the eye, so they do not change a person's appearance. I personally have had both glasses and contacts, and I love my contacts. Glasses will fog up when precipitation occurs. Glasses have give you very bad peripheral vision. When a person is wearing glasses, they can not wear a scrumptious pair of sunglasses, but if you wear contacts you can! Contacts are way better for athletics because they are not distracting like glasses. Sometimes contacts can hurt, but solution or eyedrops can fix that problem. Lastly, glasses are just uncomfortable. They are very unnatural and they can be annoying to deal with. Contacts feel way more natural and when they are in correctly, a person can not even notice them. Contacts are the way Tengels would go every time.

N.P. "Typical Pair of Single Vision Glasses." Photograph. Wikipedia. N.D. Web. 1 Oct 2014.

Go to these sites for more information. 

http://www.allaboutvision.com/contacts/faq/contacts-vs-glasses.htm

http://www.eyedoctorguide.com/contact_glasses/glasses-contacts.html