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Two large glass plate are placed vertically and parallel to each other inside a tank of water with separation between the plate is equals to 1 mm .Find the rise of water in the space between the plates surface tension of water equals 0.075 Nm^-1
Asked by Harshjaiswal9450 | 27 Apr, 2020, 12:26: PM
answered-by-expert Expert Answer
Surface tension force is acting along the length l on both the plates.
 
Hence surface tension force = T × 2 l
 
surface tension force is balanced by weight of liquid column,  l×h×d×ρ
 
where h is rise of water column, d is distance between plates and ρ is density
 
Hence we have,  T × 2 l = l×h×d×ρ×g
 
h = 2T / ( d×ρ×g )  = ( 2 × 0.075 ) / ( 1 × 10-3 × 1000×9.8 ) = 0.0153 m  ≈ 15 mm
Answered by Thiyagarajan K | 27 Apr, 2020, 14:43: PM

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