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Grade 12Engineering Entrance Exams

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite which is revolving around the earth. The rise of water in a capillary tube will be (a) 0.1 m (b) 9.8 m (c) 0.98 (d) Full length of capillary tube

Profile image of Abhishek
12 Years agoGrade 12
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2 Answers

Profile image of Arun
6 Years ago
Height of capillary rise liquid is given by h = 2T/(rρg) . T is surface tension, r is radius of capillary tube, ρ is density and g is acceleration due to gravity.
 
Since acceleration due to gravity is in denominator and acceleration due to gravity is negligibly small at the orbit where satteleite is revolving around the earth, capillary rise will be very high. So 'full length' may be the correct answer
Profile image of Vikas TU
6 Years ago
Since, the gravity is negligibly small at the orbit where the satellite is revolving around the earth so the value of acceleration due to gravity will be negligible and capillary rise will be very high.
So, the full length of the capillary tube is the right answer.

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