User:MAranyavickul
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Assignment 1:About me
My name is Marisa Aranyavickul. Currently, I am a freshman in Stony Brook University,majoring in Biochemistry. I was born in United States but was raised in Thailand for 5 years until we came back in 2001. Adjusting to the new environment is always a tough job for me. Even though it has been almost seven years, I am still adjusting. Usually, I am quiet and seem shy, which is due to my lack of confidence in speaking English. My English is weak although I have been here quite long. Thus, if I do say something wrong, please correct me, so I would learn, or if I do not understand what you are talking about, do not be annoyed. My hobbies are watching dramas, reading manga (comic books), listening to music, playing online games and drawing. As you would expect, I waste a lot of time on entertainment. However, SBU introduces me to new activities such as tae kwon do, yoga, and hip hop dance. I am glad that I am starting to have a more healthful life.
WISE 187 go back to WSE 187 page
Assignment 2: 1st Experiment
We had an experiement on the efficiency of the detector. The purpose of the experiment was to determine the efficiency of the detector by comparing the counting of two stes. First set consists of box 1,2,and 3, while second set consists of box 1 and 3. The boxes in which volatage was applied on to make the particles run through are stacked on top of each other. We run the experiement for 100 seconds for different voltages. The count in box 2 is treated as noise.
From the graph, we conclude that the efficiency of the detector increases as the voltage increases. However, efficiency is at the plateau when the noise reaches some point (around 110 Hz).
Assignment 3:Possible experiment
"Because cosmic rays are electrically charged they are deflected by magnetic fields, and their directions have been randomized, making it impossible to tell where they originated." http://www.mariachi.stonybrook.edu/wiki/index.php/What_are_Cosmic_Rays%3F
1. If I were to take the statement literally, that means magnet would deflect the direction of cosmic ray. Thus, we could use magnets to get the particles to be mostly on the same direction and see if it will affect the counting.
However, it is not possible to do so in class.
2. Another possible experiment is to test how altitude of the boxes affect the counting of the particles.
hypothesis: the higher the altitude, the more counts.
3. How does relative position of the boxes affect the counting?
Hypothesis: The further the distance between boxes, the less efficiency.
April 15 Relative Distance vs. Rate Experiment
Here are my raw data from April 15 Raw data as text
In this experiment, we are trying to see how relative distance between the detectors would affect the rate. Our hypothesis is that if distance between the boxes increases, the rate would decreases. This is because the range of different directions that particles could hit the detectors decreases as the angle decreases. The chart support our hypothesis.
Assignment 4
1. What is statistical error? 2. An old TV commercial used to say "4 of 5 dentists surveyed approve the use of Trident gum." If the manufacturer of this product only asked 5 dentists for their opinion, is this a valid survey? Why or why not?
Answer:
1. Statistical Error is when the measurement is slightly different each time you measure.
2. That is not a valid survey since they only survey a small group of people. By giving a ratio of 4 of dentists when only 5 dentists were aksed, the company is deceiving the viewers. 4 of 5 out of total of 5 cannot represent the majority.
Experiment
On the last lab, we tried to get all missing data and plot the graph.
Assignment 6
Experiement: Distance vs. Rate
Experiment: Velocity
