How Water Spurts
You will need: A length of cardboard tubing,
plasticine, water, and gimlet.
Take a length of cardboard
tubing and use a gimlet to bore four small holes equal distances apart along
the side of the tube, as shown in Fig. 1.
plasticine as a cork at one end of the tube, forcing the plasticine into
position so that the joint is watertight.
The tube is now ready for
your experiment-which will be best performed either in the garden or over a
bathtub or large bowl.
Take a large jug of water
and fill the tube. Immediately, water will begin to spurt from the four holes.
You will find that the holes nearest the top of the tube have the weakest jets.
It is the lowest hole, bearing the pressure from the full column of water,
which will spurt the farthest.