BIO NMDCAT Biological Importance of Water

nmdcat.online June 27, 2026

The phenomenon of capillary action in narrow glass tubes is driven by the combined forces of

A. Cohesion and viscosity

B. Adhesion and surface tension

✓

C. Specific heat and latent heat

D. Density and vapor pressure

📝 Explanation

Capillary action is the rise of water against gravity. It results from adhesion (attraction of water to the polar glass walls), which pulls water up the sides, and surface tension (from cohesion), which pulls the entire water column upward to minimize the surface area.

📖 Additional Information

Cohesion and viscosity
Adhesion and surface tension
Specific heat and latent heat
Density and vapor pressure

Capillary action is the rise of water against gravity. It results from adhesion (attraction of water to the polar glass walls), which pulls water up the sides, and surface tension (from cohesion), which pulls the entire water column upward to minimize the surface area.

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