Nuclear Reaction

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Nuclear energy :

          What are nuclear reactors? Nuclear reactors are machines that use chain reactions to keep a constant flow of neutrons made by fission of nuclei. This works by the heat from nuclear fission boiling water which turns it into steam. This steam then turns turbines connected to a generator to produce electricity. Nuclear energy actually is America's 3rd biggest electricity source and is 11% of the world's electricity. There are also 430 nuclear power reactors in 31 countries!

Nuclear Disasters: 

    What is the Fukushima Crisis? The Fukushima Crisis occurred on March 11th, 2011. A tsunami hit the reactors but al four shut down immediately when an earthquake hit before the tsunami. 3 cores melted in the first 3 days due to the tsunami cooling them off. After this happened radiation in the water caused the government to evacuate 100,000 people for safety

Should we use nuclear reactors?


    Now this is a tough question. I mean nuclear energy is technically a clean energy source (except the uranium part), it doesn't use fossil fuels to generate electricity, and it is a way to keep a 3rd of America's power going. On the other hand though if a nuclear power plant melts/ has a disaster then the radiation would make the land unlivable for years. Also it would most likely cause a big evacuation and just wouldn't be safe if something did happen. At this point since disasters like Fukushima don't happen often or they just arn't as terrible as Fukushima, I'm all for nuclear energy. Its a great way so the world doesn't have to depend on non-renewable energies and since so much of the world is already using it then we can just increase that number of plants.

Kinematics ::the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.

Well lets start off with something easy... like the definition of kinematics. Kinematics is the study of motion in objects and all moving things.

           Now onto the less easy thing, kinematics in the real world. Lets start with my first choice, and one of many that was a prime example of kinematics at its best.

http://www.physicscentral.com/explore/action/crashreconstruction.cfm
This article explained the importance of physics in the Police Crash Reconstruction Team to be able to understand what occurred at the crash, and who should get the punishment. They can use Newton's Laws of Motion to recreate skid marks, to find the direction the vehicle was moving, and the speed of the vehicle. Officers can also use the material of the ground to help ongoing investigations. Physics in a Crash Reconstruction Team is like a fire hydrant to a dog. You need both to do something good in the world.

https://www.youtube.com/watch?v=5BOUohniyJU
This commercial is a great example of friction. The man while trying to impress the girl with his great parkour skills, uses friction to scale down the building and up. This style of free running requires him to use the friction from his sneakers to stop from falling off the walls. He also uses each wall to have less force than falling straight from the roof to the ground below.

http://www.wired.com/2012/09/the-physics-of-nike-hyperdunk-2/
Now for the last example, and my favourite example. The Nike+ Hyperdunk shoes use physics to record and track athletes progress in many sports. This device can show you your progress on your every day iPhone. A dad wanted to put this to the test by using the jump height feature of this item. He used the equation:

After being able to calculate his jumps, he tried to cheat the system. He moved his legs to try and jump a bit higher, and he used his arms to change the center of his body. These attempts didn't work that well and he concluded that the device records hang time and not actual height. This device still uses kinematics to find and record many skills that are needed for sports.