Electromagnetism: Lemon Battery

Real World Connection:
http://www.ilounge.com/index.php/articles/comments/best-practices-for-ipad-battery-charging/
http://inventors.about.com/od/bstartinventions/ss/How-A-Battery-Works_4.htm




    This pass week we learned about electromagnetism. We discovered how and why attraction and repulsion happen. The attraction through polarization happens because like charged objects repel, oppositely charged objects attract, and neutral and charged objects attract as well. With this concept we can understand what voltage (electrical potential) and electric potential energy is. Voltage is like a "field" surrounding charged objects. Voltage is like a mountain where negative charges run "uphill" and positive charges run "downhill" because opposites attract and like charges repel.

  With what we know about electromagnetism, we can apply this knowledge to how a lemon battery works and how an ipad battery works. Before we began the lemon battery lab, we reviewed what we know about elements. There are elements that can be easily shared or taken from like copper and zinc. In this lab, the copper helps create these electrons that reacts with zinc through the wires used, causing to light the light bulb(making energy). The battery of the ipad works the same way. The battery is like the lemon. However, this battery is called a Lithium Ion battery. These batteries contain electrons that reacts well with each other to cause the ipad to work efficiently.The positive electrons attract with negative electron when being charged. The negative electrons attract to the positive electrons when being discharged:
                            















 For the future, technology will advanced. Ipads will become smaller and faster because of these lithium batteries. Lithium ions are said to be dominant rechargeable battery of technology for the future/present. Researches also found out that silicon can have 10 times more energy but breaks down easily. To solve this problem, polymer was develop to absorb 8 times the lithium and so far it hasn't broken down.

Projectiles

  In this lab we learned about projectile motions, which are objects projected in the air at an angle. Projectiles constantly accelerating in the force that gravity is acting on. Because we live in a 3-Dimensional world, we can analyze them separately. To help explain and better our understanding of this, we did a lab of an example of a projectile. In our groups we made projectiles by shooting a basketball. We recorded our shots into video physics and it helped us create projectile graphs:

We can analyze these graphs by the x-dimension and y-dimension:

X-Dimensions:
In this dimension we learned that the object will always be moving at constant speed in  (top graph)x-time and (bottom graph) v-t and over time it gains distance. It never speeds up or slows down.

Y-Dimension:
In this dimension we learned that the object is constantly accelerating. In top graph, the object is moving up but slowing down and when it reaches its highest point it stops moving then moving down but speeding up. In the bottom graph, the object is accelerating too, like the top graph. Its moving up but slowing down then stops moving at its highest point then continues moving down  but speeding up in the negative direction.