Uploaded June 2021 | Updated September 2026, 10 hours ago
The video shows screwdrivers in the air flow generated by pressurized air using a conventional industrial air gun.
We have a high pressure area on the side of the screwdriver, and a low pressure area where flow accelerates over the rounded top of the handle.
The screwdriver floats when the forces resulting from the low pressure area, the high pressure area, and the gravitational force are balanced.
The same effect is observed with a roll of tape, a metal ball and other objects.
The video shows screwdrivers in the air flow generated by pressurized air using a conventional industrial air gun.
We have a high pressure area on the side of the screwdriver, and a low pressure area where flow accelerates over the rounded top of the handle.
The screwdriver floats when the forces resulting from the low pressure area, the high pressure area, and the gravitational force are balanced.
The same effect is observed with a roll of tape, a metal ball and other objects.
![EMF. Voltage as fuction to time, [V = f (t)].](https://i.ytimg.com/vi/560jYVnlIrM/mqdefault.jpg "EMF. Voltage as fuction to time, [V = f (t)].
Homemade science is a collection of classroom tested ideas, suggestions, projects, and experiments that I have used in teaching physical science for schools in Cyprus. I have taught science for 20 years. My intention is to share these ideas with other teachers or anyone who has an interest in science. I have found that designing and building my own equipment has taught me more than any course that I have ever taken. I hope that you consider trying this for yourself. I also share and show some of these ideas at workshops, science conferences, or inservice presentations.")
