Today we will see another activity to show the surface tension of liquids. Take milk in a broad vessel. Sprinkle some pepper powder on the surface of milk. Take a drop of soap solution. Gently introduce it on the surface. Pepper powder scatters towards the wall of the vessel. The wow factor persists irrespective of the age group. I have performed this activity many times using other liquids like water and salt water. EXCITEMENT persists.
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