LIFE SCIENCE

Detailed explanation-1: -The high surface tension helps the paper clip-with much higher density-float on the water. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.

Detailed explanation-2: -When a large object like a log or a boat floats on water it is because the object is less dense than the water it is displacing. Small objects like dust, paper clips or insects like water striders can float on water even though they are much more dense than the water.

Detailed explanation-3: -When the tissue is submerged, the paper clip remains on top of the water because of the surface tension of the water. Adding soap reduces the surface tension of water. Soap, a surfactant, will cause the paper clip to sink.

Detailed explanation-4: -Surface tension allows water to hold up materials heavier and denser than itself. For example, the high surface tension of water enables a paperclip to float on the surface of water, and also allows some insects to walk on the surface of water.