Take a long rubber band and cut it at one point . At one of its ends tie a clean washed stone or a 50g weight as shown in figure
Now hold the other end of the rubber band and make a mark there . Keep the stone hanging in air and measure the length of the rubber band from the stone to the mark made earlier . now take water in a pot and hold the rubber band at such a height that the stone sinks in it . again measure the length of the rubber band up to the mark . :
What could be the reason for a shorter length of the rubber band in water ? :