Tornado in the Bottle

テキストボックス: .Why does moving the bottles in circular motion, makes the water drop faster and formed a tornado? When we place the bottle with water on the top, the water does not fall because of the low compressibility of the air, which takes up the lower bottle and does not let any space for the water to fall. By the time, you swirl the bottle, a vortex is formed. The vortex allows the air from another bottle to come into the upper bottle which allows the water to fall faster. The vortex looks like a tornado in the bottle.

Taking it further:

1. Make a variation on the size of the hole between the bottles. Find out what size of hole will produce a good tornado and what size will not produce a tornado.

1. Fill one of the bottle about three quarters full of water.

2. Make a hole in the cap of the bottle about 1 cm in diameter. Use it to cover the bottle filled with water.

3. Connect the two bottles together using electrical tape. The empty bottle should be at the top this time. Make sure that you connect the bottles properly that no water can pass through it.

4. Turn the connected bottle upside down so that the bottle with water will be on top. Don’t press the bottle. Observe what happen. How long do you think it will take to all the water to drop?

5. Now, swirl the bottle in circular motion. You should observe that the water is dropping fast and a tornado like is forming in the water. If you want to see again the tornado, just reverse the bottle again and don’t forget to swirl the bottle in circular motion, the same thing will happen.

PROCEDURE:

· 2 Plastic bottles

· Electrical tape

· Water

· One bottle cap

3/4 of water

TORNADO

Electrical tape

テキストボックス: EXPERIMENT LISTS PHYSICS Balancing a Dragonfly Does Air Takes Up Space? Improvised Battery (Option 1) Improvised Battery (Option 2) Improvised Battery (Option 3) Tornado in the Bottle Diver Surface Tension and Air Pressure Aluminum Wrap Railway Light to Sound Magnetic field in 3D Simple Kaleidoscope Art in Polarizer Simple Spectroscope Electrostatic Motor Paper Earphone CHEMISTRY Vegetable/Fruit Charcoal Red Cabbage Extract (Identifying Acidity of a Liquid) Alkalinity of a Liquid Crayon Making Hand Printing using Soap Testing Raindrop Acidity using Red Sweet Potato Powder Magic! (Water doesn’t fall?) BIOLOGY 1. Leaves Puzzle ACTIVITIES Fossil Hunting Gold Sieving Smelting Steel Observing Classes Attending Trainings