Essay on Ob Scertainer Lab Report

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Peter Peng HCC Chemistry 9/16/13 Ob­Scertainer Lab Report Purpose: What is the configuration or design inside the closed container, known as an
Ob­Scertainer?

Hypothesis: If there is a steel ball moving within each Ob­Scertainer, then their paths will be changed due to walls and partitions within the Ob­Scertainers, because the steel ball will encounter these obstacles, changing its path to move within the Ob­Scertainer. Conclusion: When doing this experiment, I used my senses of touch and hearing to predict what the inside of the Ob­Scertainers looked like. There
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I ran the ball along a suspected wall and a straight wall gave off a rigid noise while a curved line, or the edge of the Ob­Scertainer, made a smoother sound. This also holds true for the way it felt in my hand. My determination of
Ob­Scertainer #1 went two different ways until I came to the actual model. For my hypothesis, I thought it was just one straight line. For my retest, I heard a smooth sound. To come to an actual model, I tested again and found the ball hit a “stop” at the middle. Instead of a single straight line or single curved, I came to two straight lines. For Ob­Scertainer #10 I heard all rigid sounds that had greatly suggested a square. A first test I did with all Ob­scertainers was attempt to roll the ball fast around the edge, to check for walls or partitions. For #12, I immediately knew there were no outer walls or partitions because I was able to roll the ball around the outer path at a fast pace. This method will

immediately tell you if an Ob­Scertainer has a distinct wall or partition. Ob­Scertainer #9 couldn’t have the ball roll smoothly because it had small walls jutting out from the walls of the
Ob­scertainer.
I also spent much time on Ob­Scertainer #4. It got difficult when you had a shape, not just a wall, coming out from the side. I had to be precise to get an accurate reading. In my hypothesis, I knew there was a shape in the Ob­scertainer, but it was a general

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