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What phenomenon is primarily responsible for the spherical shape of small raindrops?
Question

What phenomenon is primarily responsible for the spherical shape of small raindrops?

A.

Capillary Action

B.

Viscosity

C.

Surface Tension

D.

Air Resistance

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.

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