Science Project on “Hanging in Mid-Air”, Project Experiment Topics on Energy in Different Forms for Class 8, 9, 10 and 12 Students.
Hanging in Mid-Air
Materials Required:
- A hair dryer
- Several hardbound books
- A ping-pang ball
- Stiff cardboard of about 5-6 inches
- A square
- A table
Though it might look like magic to suspend a ping-pong ball in mid-air, actually it’s far from that. The secret that you may think belongs to this magic trick is balancing air push and pressure.
Place a hair dryer on a table, point it in such a way, that the air goes straight up. You can use some hardbound books to keep the dryer in place.
Turn on the dryer to the fastest speed, but the coolest mode. Now place the ball over the mouth of the dryer and let it go.
Notice how it remains in the same position, even after you let it go. Now if you take a cardboard box and holding it upright, slowly move it towards the ball, you will see how the ball slowly moves out. As it is squeezed between the board and the ball, the moving air is forced to get greater speed. As the air moves faster, there is a drop in air pressure and the ball is pushed towards higher air pressure. This is the same concept that makes aircrafts fly in the air.
Find out if you can make the ball go higher by making the dryer move any faster.
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