bernoulli's principle

  • TF1.1  Air Vacuum

    This consists of air from the high pressure nozzle on the table rushing out of the center of a disk. Another disk fits closely over the top. Because of the way the air will flow, the top disk will be sucked down. Strings are attached to the top disk so that a volunteer can try and pull the top off. The same applies for the apparatus in F56. A funnel is attached to an air hose and a ping pong ball will get stuck in the funnel. Another example is to reverse a vacuum cleaner so that it blows air (2102 prep room). Thereby, a ping pong ball can be suspended in air. Bending it on an angle will cause the ball to spin, but still stay suspended.

  • TF1.2  Curve Ball

    A styrofoam ball is put on a velcro bat. When swung, the ball rolls along the bat until it reaches the end. It then follows a nice curved path across the lecture center since the air flows faster on one side than on the other. The principle is the same for a thrown curve ball.

  • TF1.3  Venturi Tubes with Air

    Same concept as below. However, here the water is in the bottom of the tubes and air is blown across the top.

  • TF1.4  Venturi Tubes with Water

    This is done in lab. Water flows through a tube, a constriction, and then the same diameter tube. A verticle tube is attached to each part. The verticle water level will change according to how the fluid flows.