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Do It
photo of a ping pong ball above a hairdryer grab
  • a hairdryer
  • a ping pong ball
  1. Turn the hairdryer on the high, cool setting and point it straight up.
  2. Hold the ping pong ball over the air stream, and let go. The air pushes the ball right up.
  3. Now tilt the hair dryer. You would think that the air would just send the ball flying away! But watch... the ball stays trapped in the air stream!
what happened?
Try the experiment, tell us what happens and watch DFTV for your results! Toward which clock position can you tilt the hairdryer without sending the ball flying?

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whiz quiz
What country built the first windmills?

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