Exhibit: Bernoulli Blower
Watch the beach ball hover in mid-air. If you like, you can put your hand in the way of the air stream, either in front of the ball, or behind it. The ball seemingly hangs in the air without any visible means of support. When the fast moving air meets the ball, it is just like an aeroplane wing moving quickly through the air. A wing is shaped and angled so that the air moves faster over the top of it’s surface than under the bottom surface. The beach ball hangs low in the air stream so that the same thing happens – the air flows faster over the top. You can feel this with your hand.