NECESSARY MATERIALS:
A straw-pipe (glass pipe or plastic pipe also can be taken). A coin made of aluminum.
PREPARATION:
It doesn't matter if not done.
METHOD:
Announce a reward to the person who will be successful in picking up the coin placed on the table, with the point of the pipe and call the viewers. Ask some of them to try. When try will not be able, do it yourself in the following way:
Firstly, pick up the straw-pipe with one hand and the magic-stick with the other and then whirl the latter pronouncing the magic spell. Restrain the pipe with the lips and place its lower point on the coin. Then draw air present in the pipe with the mouth and uplift the pipe along with your head. The coin will stick to the point of the pipe and get uplifted.
THE SCIENTIFIC REASON:
When air is drawn up with the mouth, there is formed a partial vacuum inside the pipe. Consequently air from outside tries to enter into the pipe. Since the upper point of the pipe stays in the mouth and the other on the coin, air cannot enter into it. Hence, due to the presence of the external air, the coin continues to stick to the lower point of the pipe.
PRECAUTIONS:
The surface of the point of the pipe should be even. There should be no hole or leaks on the surface of the pipe. There should be the condition of Airtight between the coin and the lower point of the pipe for which 1-2 drops of water can be put over the coin.
A straw-pipe (glass pipe or plastic pipe also can be taken). A coin made of aluminum.
PREPARATION:
It doesn't matter if not done.
METHOD:
Announce a reward to the person who will be successful in picking up the coin placed on the table, with the point of the pipe and call the viewers. Ask some of them to try. When try will not be able, do it yourself in the following way:
Firstly, pick up the straw-pipe with one hand and the magic-stick with the other and then whirl the latter pronouncing the magic spell. Restrain the pipe with the lips and place its lower point on the coin. Then draw air present in the pipe with the mouth and uplift the pipe along with your head. The coin will stick to the point of the pipe and get uplifted.
THE SCIENTIFIC REASON:
When air is drawn up with the mouth, there is formed a partial vacuum inside the pipe. Consequently air from outside tries to enter into the pipe. Since the upper point of the pipe stays in the mouth and the other on the coin, air cannot enter into it. Hence, due to the presence of the external air, the coin continues to stick to the lower point of the pipe.
PRECAUTIONS:
The surface of the point of the pipe should be even. There should be no hole or leaks on the surface of the pipe. There should be the condition of Airtight between the coin and the lower point of the pipe for which 1-2 drops of water can be put over the coin.
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