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Phy 202
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.
** Collaborative Labs_labelMessages.txt **
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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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I would like to perform three experiments. The first experiment will be investigating the effect of sugar on the focal point and image of a light source through a soda bottle. The second experiment investigates volume and atmospheric pressure using a plunger. The third experiment invesigate the effect that sugar and salt in water have on the flow rate of
these solutions through a tube.
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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?
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The focal point and images of light being passed through a 2-liter bottle can determined with sugar water in the bottle. I will find out what would happen to these parameters if the bottle was filled with different concentrations of salt water. The items needed for this experiment would be water, salt, measuring spoons, a flashlight or pointer, paper, pencil, and a screen.
The same setup would be used as in the original lab, but with Karo syrup being added to the water in different concentrations.
I would test a 0.001 molar, 0.01 molar, 0.1 molar, a 1 molar solution of syrup. I would adjust concentrations that are cloudy to the eye to keep the solutions clear.
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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?
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Study the force of atmospheric pressure by observing volume and pressure. I would use two differnt size plungers. Materials required would be: two plungers of different head sizes, masking tape, paper, ruler, a smooth surface,and a marker. Each plunger would be pushed down on the floor and the force needed to dislodge the plunger would be noted.
The goal would be to determine the realtionship between the diatmeter of the plunger and the force needed to dislodge it. This would show the difference between the pressure in the plunger and the outside atmospheric pressure.
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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?
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Determine the relationship between densities of various liquids and the velocity of these liquids through a tube connected to a bottle. The materials need for this lab are as follows: soda bottle, cap with tubing, timer or watch, paper, pencil, water, sugar, and salt. I would make various concentrations of sugar solutions and salt solutions. The solutions would be placed
in the bottle, pressure applied, and the flow of the liquid through the tubing would be timed. The relationship between the concentrations (densities) and flow rate would be graphed and analyzed.
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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?
1hr
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&#Good responses. Let me know if you have questions. &#