Wednesday 25 June 2014

-: MAKING A HOVERCRAFT :-

It Is a science toy which works on the phenomenon of the surface tension of water. It makes use of mothballs, which weaken the pull of surface tension in the water close to them. The stronger pull of the surface tension in front of each mothball pulls the sticks and the snowman spins in a circle.      
MATERIALS REQUIRED


  • Draw a small snowman on the paper, color it and cut it out.
  • Cut a slice of the cork about 1 inch thick and take four rectangular pieces of light wood. Make a small notch in each piece of wood. Glue one mothball In each notch In such a way that their surfaces remain In touch with water.

  • Attach four sticks to the cork such that they are in the shape of a cross. At the free ends of these sticks, attach one wooden piece with glue.
  • Stick the snowman to the slice of the cork.

  • Take a plastic tub and fill It with water. Now, put the snowman Into the tub of water and watch It. The whole assembly will spin around due to the surface tension of water.





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