2011年9月22日星期四
Riddles
Golden body, golden neck.
Most buttons on the right.
Blow through it with mouth,
Fancy sound attracts the stage light.
Answer: Saxophone
2011年9月21日星期三
College Essay
Magic bottle
Fascinating, is all I have in my mind when I think about my kindergarten in China. However, the best memory kindergarten gave me was: It enlightened me greatly. I can still remember the happiness I had when my lovely teacher led me to explore plenty of adventures. By doing the simplest scientific experiment, we discovered the world in this small kindergarten. The most memorable thing I can think of was a experiment with magic bottle.
Fascinating, is all I have in my mind when I think about my kindergarten in China. However, the best memory kindergarten gave me was: It enlightened me greatly. I can still remember the happiness I had when my lovely teacher led me to explore plenty of adventures. By doing the simplest scientific experiment, we discovered the world in this small kindergarten. The most memorable thing I can think of was a experiment with magic bottle.
The day before the experiment, my kindergarten teacher Ms. Zhang asked us to empty some plastic bottles and bring them to school. We were really curious about what are those bottles used for. On the second day, right at the time we stepped in the classroom, she quickly collected all the colorful bottles, and filled them with water. After the bottles were completely filled, she handed them back to us with a shiny smile on her face. She mysteriously told us that these bottles are actually called magic bottles; when a hole was poked on the surface, the magic will occur. We stared at each other with a great confusion, but we are all eager to see magic. After teacher told us to go to sand ground and accomplish the magic, we rushed out with needles just want to be the first one to see. When I reach sand ground, I quickly used the needle to poke a hole on it. Wow! Immediately, I surprisingly saw the water ran from the bottles and absorbed by the sand! She saw the happiness on our face, and asked us to put pressure on those bottles. We got more excited because the flowing rate of water was increased.
It was a fun day. We quickly collect our stuffs and threw those bottles away. I realized the holes in the bottles were possibly the solution for this phenomenon, but I still could not figure out why. I worked hard on solving this by doing the similar experiment repeatedly. Using different types of bottles, distinct types of liquid, and various pressure on the testing bottles, I discovered different outcomes, but I still cannot draw to a conclusion to explain the theory behind it. .
Keeping the bottle puzzle in mind, I finally found out the answer in high school physics book. The bottle experiment is actually linked to the fluid mechanics. The deepness and density of liquid are actually the cause of the exclusion of water. The changes in those two variables will determine the rate of exclusion of liquid. The greater the density and deepness get, the greater speed of water flow and the pressure in liquid. Thus, when we poke a hole on the bottle, the pressure of bottles will push the liquid out, and pressing the bottle will lead more water to put out from water bottle.
Kindergarten life was just fabulous. Science became my determined area that I want to enter. My childhood experience really makes me realize it has a huge impact on my future. In the Cornell Engineering College, the various engineering department can help me further develop my interest on science. There are so many scientific mystery around us. Human race can not completely explain the science in the universe. Those scientific puzzles really fostered me to learn science, and I am really eager to learn more methods and knowledge.
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