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course PHY 201
10/16 6:25pm I saw where I had missed submitting this on my files. Sorry so late
`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?****
11 8-counts corresponding to 13.2s for small paperclip
3 8-counts corresponding to 3.6s for large paperclip
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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 larger clip would experience the greater change in buoyant force because it displaces more water than that of the small paperclip.
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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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The mass of the large suspended paperclip is greater than the mass of the smaller paperclip causing a lesser oscillation period.
The mass of the paperclip is pretty much negligible compared to the mass of the beam. So it has very little effect on the period of oscillation.
The difference is due to the different weights of displaced water, for a given displacement of the beam.
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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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If the suspended object was a metal cone on its apex, I think it would have about the same effect as the paperclip relative to its mass. If the cone was suspended from its base, then the oscillation period would be greater because of the vacuum of air that would be created.
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Good, but see my one note.
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