Science Projects And Inventions

NOTE : PERFORM  UNDER  ADULT  SUPERVISION

YOU  NEED:

• A handkerchief

A bit of secrecy is involved in this one. Tie a few tight knots in a handkerchief and secretly place it under one of your armpits. It will remain concealed by your clothes. Allow a friend to feel the pulse in the arm under which the handkerchief is hidden. Ask him to count up to three and you will stop your pulse. The pulse will stop much to the surprise of your friend.

HOW  DOES  IT  WORK?

To stop your pulse, all you have to do is press the sides of your arm against the knotted cloth under the armpit.

Pressure is created on the arm's main artery. This lowers the pulse rate to a level which cannot be felt.

After some time snap your fingers and end the pressure. The pulse beat will pick up. Much to the surprise of your friend.