29. Two capillary tubes of same diameter are put vertically one
each in two liquids whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne/cm respectively Ratio of heights of liquids in the two tubes h1/h2 is
(a) 10/9
(b) 3/10
(c) 10/3
(d) 9/10
Ans. d
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a