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phy 122
Your 'collaborative labs' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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When i began the course early i was using an outdated page which did not have this experiment included. I was confused when I came upon Collaborative Labs 2 and while reviewing the assignments page I found this. It seems to be worth a lot of points so I wanted to get it submitted, even though there isnt much time to really go through with the procedure as you may have intended. Perhaps this is not necessary at all as it seems this is something we would have to do in a classroom setting with other people involved.
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You will participate during the semester in two series of collaborative lab activities.
The first is designed to be relatively painless, and to begin to develop a degree of teamwork and collaboration.
These activities are designed for teams of four individuals, each with a specific function:
The designer will come up with the idea for the activity and will specify for other team members how the activity is to be conducted.
The experimenter will follow the designer's instructions to set up the experiment and collect data.
The analyzer will analyze the data.
The interpreter will describe what the results mean.
For each series of activities, you will participate in four different investigations, one as designer, another as experimenter, another as analyzer and another as interpreter.
As each investigation progresses, you will follow the work of your fellow team members.
Please summarize the above, as best you can, in your own words:
The collaborative experiments involve four individuals each with a different purpose in the experiment. The designer determines how the experiment is to go down, the experimenter carrys out the experiment and collects data. The analyzer analyzes this data, and the interpreter interprets the data.
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The first series of activities will be spread out over the first half of the semester, the second series over the second half of the semester.
The first series will be based on systems you have seen in the Key Systems videos.
You will begin by describing at least three ideas for investigations related to the Key Systems videos. Valid ideas will ultimately be developed proposals, each of which will describe a question that could be investigated and tested using simple materials such as those seen in the videos. You will eventually develop three proposals, one of which will be chosen for an investigation. You will be the designer for that investigation.
At this point we're just beginning to explore ideas for the first series of investigations. Your instructor will work with you to further develop your ideas, and perhaps to explore other related possibilities.
Right now you don't have a wide variety of experimental techniques available to you, so this first series of investigations will be relatively simple.
List below three ideas for things you think might be fairly easy to test, based on the systems you have seen so far.
The relation of the variables involved in a pendulum experiment and how they affect frequency, amplitude, and period.
Determinations in velocity, potential energy, and kinetic energy for a ball rolling down an incline.
Tension and elastic potential energy on a rubber band.
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Discuss your first idea. How do you think it might be tested? What sort of items do you think might be required? How do you think your idea might be tested?
We could start by setting up a typical pendulum and modifying string length and weight of the pendulum to see what affect this could have on the properties mentioned above. We will need a length of string and an object weighing at least a gram or more to tie to the end of the string. Holding the string at the top and allowing the weight to swing back and forth forms our pendulum. We will collect data by pulling back the weight and allowing the pendulum to swing side to side, we can determine over a given period of time the frequency, amplitude, and period, vary the length and weight, and then determine what changes occur and why.
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Discuss your second idea. How do you think it might be tested? What sort of items do you think might be required? How do you think your idea might be tested?
We will need an incline and a ball of some sorts, preferably a marble. We will need to know the length of the ramp and if we are to determine PE and KE, the mass of the marble also. We can time how long it takes the ball to roll off the ramp and determine an average velocity. We can allow the ball to roll off a ramp and determine both horizontal and vertical velocity also.
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Discuss your third idea. How do you think it might be tested? What sort of items do you think might be required? How do you think your idea might be tested?
We can measure the elastic potential energy of a spring (rubber band) by attaching a weighted object to the band, pulling it back and measuring the distance travelled by the object when released.
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Your instructor is trying to gauge the typical time spent by students on these activities. Please answer the following question as accurately as you can, understanding that your answer will be used only for the stated purpose and has no bearing on your grades:
Approximately how long did it take you to complete this activity?
About 15 minutes.
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Good ideas.
We're too far along in the course to do these experiments in the intended fashion. Your test scores and labs are good enough that omitting this activity won't make a difference in your final grade.
And since the assignment probably wasn't in the original version of the page, I wouldn't hold you to it in any case.
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