SURFACE TENSION
Samaresh Goswamy WHAT ARE NEEDED: * A Plastic Bowl of medium size * Water * A Plastic shaped Arrow shaped float with a'V' cut * some detergent powder WHAT TO DO : * Float the Plastic shaped Arrow on the Water in the Bowl * ADD a pinch of detergent powder in the water near the 'V' notch of the Plastic Arrow WHAT TO OBSERVE : *As a pinch of detergent powder is added near the V notch of the Arrow it starts moving forward. WHAT IS GOING ON : Due to surface tension the free surface of water behaves like a thin stretched membrane where equal forces of surface tension acts in...