1 . Capillary rise of mercury in a small diameter tube is proportional of (where, d = mercury of the rube, σ = surface tension of mercury)
- A. d
- B. 1/d
- C. σ
- D. 1 / σ
- D. None
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পায়রা বন্দর কর্তৃপক্ষ (বিভিন্ন পদ) 06-11-2020
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