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Kee Hyun Kim's picture

Andy and Lakesha

We began the lab by observing the movement of color dye inside the water beaker. The pace in which the color dye was moving differed depending on the temperature of the water.

The beaker containing heated water moved the fastest, followed by the one in room temperature and the color dye in the cold beaker moved the slowest.

From this observation, we were able to come to a conclusion that the higher the temperature is, the faster the molecules move.

We than proceeded to observe movements of small plastic beads in water. The beads were different in size ( 2micron, 4micron and 8 micron.) We predicted that the smaller the beads were, the faster they would move since they are lighter and are therefore easier to be moved.

However, we had some trouble with our observations.


30sec

1min

2 micron

30 micron

50 micron

4 micron

220 micron

350 micron

8 micron

350 micron

450 micron

The 2 micron plastic beads performed as expected ( each beads moved to different directions from where they started) however, we encountered a problem with the 4micron and 8 micron beads, both of them moved in bulk ( in a same wave of direction). Although we tried making different slides hoping to fix this problem, the 4micron and 8micron beads continued to perform in such manner and therefore it was impossible to make any meaningful observation.

 

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