9-29-10 Homework

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course phy 201

Questions about lab`qx001. Most of you found that the period of motion for the balance when the large paperclip was suspended in water was less than that for the straightened small paperclip. What were the two periods, and what was the ratio of the two?

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2 half cycles, 15 seconds

3 half cycles, 20 seconds

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`qx002. Which system experiences the greater change in buoyant force when the clip goes a centimeter deeper.

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The smaller paper clip.

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`qx003. Give your best explanation why you would expect the system with the large suspended paperclip to have the shorter period.

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Maybe because of the weight of paper clip and the weight of the water

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`qx004. Speculate on whether the period of motion would remain constant through several cycles, if instead of a paperclip or wire the suspended object was a thin metal cone. What difference would it make if the cone was suspended from its apex as opposed to its base? What if instead of a cone the suspended object was a sphere? These are big open questions that can easily go beyond the scope of this course so don't spend an inordinate amount of time thinking about them, but do give the cone some thought. Hint: how would the buoyant force change with the depth to which the object is suspended in the water?

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No because the object would not be balanced all the way thru its an uneven object. I don’t think it would make a difference if it would be suspened from its apex as opposed to its based. If the object was a spear maybe the odds of it being balanced would be greater because the object is even all the way thru. What I mean even all the way thru is that the object the same at the weight at both ends and also the middle unlike the cone.

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&#Your work looks good. Let me know if you have any questions. &#

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