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When researching air streams I learned about the Bernouli Principle and then knew my hypothesis was not right. Lighter objects don't float longer in an air column but they do float higher. I also learned the Bernouli principle is what makes airplanes fly.
This was shown in my experiment because the whiffle ball was lighter than the bouncy ball but
it did not float longer. It had holes in it so it did
not stay in the air column.
The lighter of the solid balls (racquetball and bouncy ball) did float higher than the solid heavier ball (soccer).
My Project Video
Procedure
I will use a leaf blower to create an air column.Then I will place various items in the air column to see which item floats longest. While the item is floating I will measure how high and long each item floats.
Independent Variables
Which item stays on the air column longest?
Constants
Research
Independent Variables 1 - 5
The speed of the leaf blower and the area in which the experiment is conducted will remain constant.
I performed the experiment inside to avoid inconsistent wind blowing.
I will use 5 different items: bouncy ball, whiffle ball, toilet paper roll, racquetball and soccer ball.
Dependent Variables
I will measure how high and long each item floats in the air column.
In my research I learned about the
Bernouli Principle that states that where air
speeds up its pressure drops. The difference
in pressure between the still air and the moving
air pushes the object back into the center of
the air stream.
I found out that this principle applies to my
experiment because the solid round items I used
remained floating in the air column.
Materials:
Hypothesis: I think the lighter item will float
longer and higher than the heavier items because they weigh less.
Leaf blower
Yardstick
Stopwatch/my ipod
Bouncy ball
Whiffle ball
Toilet paper roll
Racquetball
Soccer ball
Extension cord
Conclusions
Conclusions Continued
Air Column Experiment
by Ethan Stahl
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