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PHY 242
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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You have completed the first series of collaborative labs.
In that series you developed some important skills with teamwork, collaboration and communication. By now you have also developed additional lab techniques and insights, as well as an expanded understanding of physics and the standard formulations of motion, energy, momentum, forces and other topics.
You now have a good idea of the function of each member of the team, the designer, the experimenter, the analyzer and the interpreter.
You are also familiar with the items in your lab materials package.
The second series of activities will be spread out over the remainder of the semester. The investigations in this series will be more substantial and extensive than those of the first series, though we will limit the scope to keep the workload reasonable.
Please give a brief statement of three proposals for the second series of investigations, relevant to the topics of the labs you have performed and/or the material covered so far in the course. It should be possible to conduct your proposed investigations using the materials in the lab package, and/or common items you can expect your team members to have.
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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?
My first idea is to approximate the heat output per unit time of different settings on a gas stove. Using a pot of water, the heat output could be measured by allowing the water temperature to raise to its steady state and using the equation Q/t = mcdT. The volume of the pot would need to be known and the pot itself could be considered negligible in terms of thermal resistance.
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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?
My second idea is to verify Boltzmans constant using a microwave. Knowing the watt output of the microwave and the surface area of a known substance, and the temperature difference before and after running the microwave, Boltzman’s constant can be verified using the Q/t = e*A*T^4.
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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?
My third idea is to measure the volume of a balloon with changes in temperature. A balloon could be placed outside and measured during the day and at night when there is a reasonable change in temperature. Since pressure should remain constant at about 1 atm, the balloon should change with the realtionship V1/T1 = V2/T2
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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?
30 min.
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Very good.
It's unfortunate that we're not going to be able to do the collaborative labs this term.
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