#37 | Angle of Contact
(Physics) > Mechanical Properties of Fluids
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When a cylinderical tube is dipped vertically into a liquid the angle of contact in 140°. When the tube is dipped with an inclination of 40° the angle of contact is 

1.  100°    

2.  140°  

3.  180°  

4.    60°

 

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Two liquid drops have their diameters as 1 mm and 2 mm. The ratio of excess pressure in them is 

1.  1:2

2.  2:1

3.  4:1

4.  1:4

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W is the work done in forming a bubble of radius r, the work is done in forming a bubble of radius 2r will be:-

1.  4W

2.  3W

3.  2W

4.  W

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