Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion
Discussion Forum : Hydraulics and Fluid Mechanics - Section 6 (Q.No. 36)
36.
The mercury does not wet the glass. This is due to the property of the liquid known as
Discussion:
33 comments Page 1 of 4.
Harpreet said:
7 years ago
It's a matter of surface tension. The surface tension of the liquid, and the surface tension of the glass, determine how far a liquid will "spread" on the glass.
Mercury has a high surface tension, which maintains its spherical shape. Water has a much lower surface tension.
Mercury has a high surface tension, which maintains its spherical shape. Water has a much lower surface tension.
Kameswari bolem said:
6 years ago
I think option A is correct. Capillarity is the property of both cohesion and adhesion. But surface tension is due to cohesion only it does not involve adhesion. As cohesive force is higher than adhesion in mercury it does not wet the glass.
Yatheesh said:
6 years ago
Cohesive Force between Hg molecules is the reason behind Surface Tension of Hg. So I think the Cohesive Force is the right answer. Because without Cohesive Force there is no Surface Tension.
Ram said:
7 years ago
When it is asking about property, it is surface tension. If it is asking about force then it is cohesive force, because cohesion and adhesion are the molecular attractive forces.
Deepak said:
3 years ago
The Correct answer should be option A. Surface tension is due to unbalanced cohesive force, so the reason behind surface tension is cohesion between the fluid particle.
(1)
Shriyash said:
6 years ago
As we know that mercury shows upward movement with convex shape which is due to the cohesion property. Surface tension is also due to cohesion. So both are correct.
Hitesh said:
1 decade ago
I think Hg does not wet the glass due to the virtue of cohesion as in the cohesion, atoms get together only with similar atoms of the same material.
Meet said:
7 years ago
The surface tension is due to cohesion only and in question 'PROPERTY OF FLUID' (cohesion is FORCE)is asked. So the answer is surface tension.
Anuj kumar said:
7 years ago
Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.
ABHISHEK SHUKLA said:
5 years ago
As surface tension is due to cohesive force only. Surface tension is correct. But according to me cohesion is the exact answer.
(1)
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