Fluids > Fluid Statics > Atmospheric Pressure
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DCS# 2B30.70 |
VACUUM BAZOOKA
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APPARATUS
vacuum bazooka
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202-alcove |
mylar
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202-16-F6
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pvc
coupler
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202-16-F6
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fresh ping pong ball
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202-16-F6 |
vacuum
pump
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202-cart
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exacto
knife
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202-02-E2
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ear
plugs
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013B-02-B
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can
holder
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202-16-F6
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three
pop cans
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DESCRIPTION
- The bazooka is loaded with one or
more ping pong balls and its ends sealed with mylar. Evacuate the
tube, then puncture
the mylar at the ping pong ball end and the inrushing air will drive
the ball with
great speed out the other end, through two or three pop
cans in its path.
NOTES
Prepare the bazooka
by
loading the ping pong ball and sealing each end with a
square of mylar held in place with a rubber coupler and hose clamp.
Mount it at a slight angle so the ball stays near
the puncture end.
A pair of photogates can be used to determine the exit speed of the
ball. Measurements using the 3-m version yield speeds of about
250 m/s.
REFERENCE