Correct option is C
The correct answer is (c) Surface Tension.
· Surface tension is the force that causes liquid surfaces to contract and behave as if covered by a stretched elastic membrane.
· In the case of raindrops, surface tension pulls the water molecules inward, forming a spherical shape, which has the least surface area.
· This effect is more pronounced in small raindrops, as surface tension dominates over external forces like gravity.
· Larger drops may become slightly flattened due to gravity, but smaller drops remain nearly perfect spheres.
· Surface tension plays a vital role in the stability of small liquid droplets in nature.
Information Booster:
Surface Tension:
· Results from cohesive forces between liquid molecules.
· Helps insects walk on water due to the 'skin-like' surface of liquids.
Capillary Action:
· Occurs when a liquid flows in narrow spaces without the assistance of external forces (like gravity).
Viscosity:
· A liquid's resistance to flow, related to its internal friction.
Air Resistance:
· The force air exerts on moving objects, affecting raindrop speed, not shape.