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Science Fair

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This is the component we are missing: Hall effect sensor.

Our research question is “How does magnetism change with distance?”

The topic in important because it reveals the relation between magnetism and distance, and it’s an interesting topic to study.

We did research on where to get the components and how the final effect of this experiment will look like. We haven’t collect any datas yet, in fact we are missing a crucial component that would cost a lot on Amazon, it’s the only way to get it. We did assembled every thing on a breadboard and made sure everything is functioning.

We plan to do multiple test and get the average statistic. Here is the list of components we are using:

  • Breadboard
  • 9 V battery
  • 9 V battery snap connector
  • LM7805 voltage regulator
  • A1302 Hall effect sensor
  • Jumper wires (assorted)
  • Alligator clip leads (2)
  • Multimeter
  • Magnets (2)

The procedure:

*Set up the experiment area using the materials stated previously to build the gaussmeter circuit,

Make sure that the multimeter displays 2.50 Volts when no magnets are nearby, move the magnet towards the hall effect sensor to test magnetic field (when a magnet is brought nearby the voltage should fluctuate, if the mutimeter shoots up to 5 volts use a smaller magnet,

Prepare a data table to record distance and voltage,

make sure the sensor is not near any magnets. Record the voltage displayed on the multimeter in your lab notebook and label it as “V0“.

Now, starting with the magnet touching the face of the sensor (a distance of zero), record the voltage displayed on the multimeter.

Slide the magnet directly away from the sensor (make sure you move it straight backwards, not to the side). Record the new distance and voltage in your data table.

Repeat step 6 until the voltage stops changing.

Repeat steps 5–7 at least two more times, for a total of at least three trials.

Calculate an average voltage for each distance.

Now, convert voltage to magnetic field strength. You can do this using information from the sensor’s datasheet, which says that the sensor has a sensitivity of 1.3 mV/G (note that the sensitivity is given in millivolts (mV) and you took your readings in volts (V), so you will need to convert from V to mV). You can convert voltage to field strength using the following equation:

Equation 1:

B=V0−V1.3

  • B is the magnetic field strength in gauss (G).
  • V0 is the voltage when there is no magnet nearby in millivolts (mV).
  • V is the voltage recorded at a certain distance in millivolts (mV).
  • 1.3 is the sensor’s sensitivity in millivolts per gauss (mV/G).

Make a graph of magnetic field strength versus distance.

We connected with Mrs. Casey.

My science quote

junyux20191 Comment

My favorite science quote is from Isaac Asimov:

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.            – Isaac Asimov (author and biochemist, 1920-1992)

Isaac.Asimov01

Reason:

I think the quote is good because science is accelerating the development of the society. Scientist are most often the wisest mind in the human society. Society gain person experience and social wisdom and skills, but science gain you knowledge quicker than society gain you wisdom. Science is developing very fast, as more knowledge is discovered, more problems will unfold, but human intelligence haven’t improve for he past thousands of year. Human once went on  the moon, but they didn’t because they fear something would happen, the fear was a signification of unknown knowledge that people doesn’t have enough wisdom to solve. Asimov as a sci-fi writer, he was very foresighted, I agree with him.

Citation:

File:Isaac.Asimov01.jpg. (2019, December 20). Wikimedia Commons, the free media repository. Retrieved 17:51, January 30, 2020 from https://commons.wikimedia.org/w/index.php?title=File:Isaac.Asimov01.jpg&oldid=381785250.

Math Finacial Leteracy Project

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Here is the VideoI can work with others to achieve our goal, I did my share by:

I organized and assigned the mission to my crew members. In addition I helped with the budget part.

I tool responsibility for finishing my part of this group project by:

I Googled the destination of our project, organized a good route and schedule. According to the route and destination, I booked a hotel with a decent price. Then I did the  calculation and got the total cost of our trip. Then I wrote the script for the narration. And Daniel did the narrating and Aiden did the editing.

 

Favorite Picture

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My favorite picture was shot on my 15th birthday, I was lucky that one of my classmates had the asme birthday as I do, it was memorable. They has always been my best friends. Some of them cried at that day because they know that I’m gonna study in Canada. My parents helped took this picture.

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Favorite quote

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My favorite quote is from a famous Chinese classic, called “I Ching” , which I already knew when I was five and the quote has always been my principle.

The quote is ” The movement of heaven is full of power.Thus the superior man makes himself strong and untiring.”

This quote ecourages men to be positive, active, and change their lives. Besides that, I tells you to be tolerent, to adapt all people and all stuff.