Material for rain-proof coats and tents owe their water proof properties to ________?
Correct answer: B. Surface tension
- A. Viscosity
- B. Surface tension
- C. Specific gravity
- D. Elasticity
Explanation
Surface tension makes water form droplets and resist entering the tiny openings in closely woven or coated fabric, helping raincoats and tents repel water. Viscosity and specific gravity do not provide this waterproofing mechanism.
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