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Materials
Needed: |
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1)
2 - Five Gallon Water Jugs
(purchase at a hardware store or
get defective ones without holes
from a water supplier) |
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2)
2 - 1.5 inch Rubber Couplings |
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3)
1 - 1.5 inch PVC Plug
(With Adult Supervision:
Drill a half inch hole into the plug) |
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4)
Water |
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5)
Drill |
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6)
Screwdriver |
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Procedure
(With Adult Supervision): |
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1) Put
one rubber coupling on the neck of each water jug as seen in Step 2
of Materials (It will be very tight fitting, but you need to get the
coupling around at least 1 to 1.5 inches of the neck) and then tighten the
bottom metal clamp on each rubber coupling.
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2) Fill
one of the water jugs about 1/3 of the way up with water
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3)
Drill a half inch hole through the PVC Plug as seen in Step 3 of
Materials.
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4)
Loosen the top metal clamp of the the water jug with water
(using a screwdriver) and place the PVC Plug half way inside and
then tighten the metal clamp around the plug. |
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5)
Loosen the top metal clamp of the empty water jug, place the empty
water jug upside down on the other side of the plug, so both rubber
couplings are completely touching all the way around and then
tighten the metal clamp around the plug. |
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6) The
Completed Giant Tornado Jug should look like this: |
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7) Flip
the Giant Tornado Jug upside down, so the water jug with the water
in it is on top.
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8)
Wiggle the top jug with the water in it in a circular motion until
the water inside the jug starts spinning. This will then
create a tornado in the water as the water starts to fall into the
bottom jug. This is the same effect as draining the bath tub
or sink. |
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Explanation: |
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The water in
the top jug creates a layer of surface tension on the drilled hole
in the PVC plug, so very little water falls to the bottom jug.
With the force of gravity and the weight of the water in the top
jug, there is a great amount of pressure being put on the PVC plug.
Therefore to break the surface tension, all the pressure of the
water needs to be focused on the drilled hole in the PVC plug.
This is accomplished by spinning the water in the top jug to create
a funnel or tornado causing all the pressure of the water to be
placed onto the drilled hole in the PVC plug breaking the surface
tension and allowing the water to fall into the bottom jug.
The result of breaking the surface tension is a perpetual tornado in
the top jug until the water completely drains to the bottom jug.
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