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O b j e c t i v e s
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In addition to illustrating a potential
energy source that the students may not have thought about, this
activity is intended:
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(1)
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To demonstrate the
energy transformations that take place in converting wave motion
and force into useful work (Figure 3). |
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(2)
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To have high school
students develop an engineering solution for obtaining one-way
rotation of a pneumatic turbine in a reversing airflow. |
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(3) |
To suggest extended
activities that the students can pursue on their own.
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The
following materials are needed: |
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(1) |
A five-gallon bucket (or sink that can be
filled to a depth of at least 8 inches) |
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(2) |
A source of water near the demonstration site |
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(3) |
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A plastic water bottle with screw cap and
large drinking straw.. These are about the size and shape of
a tennis ball can, and are frequently seen in the hands of
car drivers, joggers and kids. They can be bought at sports
shops or supermarkets and are often handed out as
promotional items—you may already have one lying around the
house. |
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(4)
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A "turbine wheel" whistle of the type
that might be used by a bad stand-up comedian or handed out
as party favours. They can be bought at novelty stores or
party supply shops. |
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(5) |
A small, sharp-bladed utility knife. |
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(6) |
Six strips of opaque adhesive tape (plastic,
electrical, or duct tape all work), 1.5 inches long by 3/4-inch
wide |
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To go
onto the 3rd of 5 pages click on
::
Preparing The Model
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