alleryOil climbs up a cotton wick in spite of:
AGravity
BDensity
CViscosity
DPressure
Answer & Solution
Correct answer: A. Gravity
1. The wick is threaded with very fine gaps between its fibres.
2. Surface forces draw the oil up along these gaps.
3. The oil rises even though gravity pulls it down.
_Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._
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