The lower end of a capillary tube of radius r is placed vertically in water. Then with the rise of water in the capillary, heat evolved is
Text Solution
Verified by ExpertsB
When the tube is placed vertically in water, water rises through height h given by 
Upward force 
Work done by this force in raising water column through height h is given by
However, the increase in potential energy 
of the raised water column 
where m is the mass of the raised column of water 
So, 
Further,
The part 
is used in doing work against viscous forces and frictional forces between water and glass surface and appears as heat. So heat released
= 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems