Essays

YOU NEED:

• Two bolts

This one  does not need any apparatus. This experiment  can be done in the head. Just imagine that

 bolts are placed together so that their three dimensional spiral structures, called a helix, intermesh with,

each other as shown in the illustration.

Now move the bolts around each other in your mind. It will be similar to twiddling your thumbs holding each

 head so as not rotate it. Move the bolts in the direction of the arrow. Will the heads

i)                    Come close to each other

ii)                   Move away from each other

iii)                 Or be static?

Solution : You will be surprised to learn that the answer is iii) .It is comparable to a situation where someone is

 up an escalator moving downwards.