Science Project on “Hanging a Bottle”, Project Experiment Topics on Electricity, Magnetism Gravity for Class 8, 9, 10 and 12 Students.
Hanging a Bottle
Materials Required:
- A Coke bottle
- Uncooked rice
Use the uncooked rice to fill a Coke bottle tightly.
Insert a pencil, a chopstick or a rod along the neck of the bottle, into the rice.
You will find that when you lift the pencil, the bottle comes with it!
Chances are that you may need to try out several times, before it sticks in the rice.
Give the pencil a twist and you will be able to remove it from the rice with ease.
This trick will work with any bottle or container, as long as its opening has a smaller circumference like the Coke bottle.
The trick is of Indian origin, where fakirs are known to push in a dagger into a bowl of rice.
They then lift the knife with the bowl hanging from the dagger point.
For this experiment, the explanation is simple, the force introduced by the pencil is distributed among the packed rice grains.
They perforce press firmly both against the pencil and the sides of the bottle.
Once you twist the pencil, the forces break. It allows the pencil to move out freely.
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