Category : Science Projects And Inventions
YOU NEED:
You may not believe this but a table – tennis ball has a strange affinity for a stream of water. Find out for yourself. Take the thread and tape one end to the table tennis ball or Ping Pong ball. Turn on the tap or faucet in a sink and push the ball halfway into the stream as shown in the illustration. Normally one would expect the force of the water to knock the ball out of the water stream. But it doesn't. The ball remains static inside the stream.
HOW DOES IT WORK?
The air pressure on half the ball's surface over which the water flows rapidly, is reduced. The higher air pressure on the Ping-Pong ball's other half, continues to force the back into the running stream of water.
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