Question
Physics Question on Surface tension
A glass capillary of radius 0.15 mm is dipped into a liquid of density and surface tension 1600 kg/m3 and 0.12 Nm-1,respectively. The liquid in the capillary rises by a height of 5.0 cm. The contact angle between liquid and glass will be:(Take g=10 ms-2)
A
30°
B
0°
C
45°
D
75°
E
60°
Answer
60°
Explanation
Solution
The correct answer is (E):60°