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Surface tension minimizes surface area, making a sphere (with the least surface area for a given volume) the natural shape of a liquid drop in the absence of external forces like gravity.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
Surface tension creates a contractile force at the drop’s surface, requiring higher internal pressure (ΔP = 2S/r) to balance this inward force, as the curved surface tends to reduce its area.
Ref: NCBI Bookshelf, Ideal Gas Law: P1V1/T1 = P2V2/T2.
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