Answer #322

The answer is (e): the ball will leave the tube through the lower opening and re-enter the tube through the upper opening, as seen in an mpeg video by clicking your mouse on the photograph below.

Through the process of entrainment the air flow caused by my blowing on the mouthpiece causes air to flow through the tube, into the upper opening and out of the lower opening. The styrofoam ball follows this air flow, as seen in the video.

I do not believe that the Bernoulli effect has anything to do with this demonstration.

Question of the Week

Outreach Index Page

Lecture-Demonstration Home Page

For questions and comments regarding the Question of the Week contact Dr. Richard E. Berg by e-mail or using phone number or regular mail address given on the Lecture-Demonstration Home Page.