Civil Engineering - Hydraulics - Discussion
Discussion Forum : Hydraulics - Section 3 (Q.No. 23)
23.
Molecules of fluids get attracted due to
Discussion:
44 comments Page 1 of 5.
Mukul said:
6 years ago
Cohesion- attractive force between similar bodies. (Here water molecules are similar bodies).
Adhesion- attractive force between two different bodies (water attached to the glass).
And, mercury in the glass does not wet it or doesn't wet when kept on the table because of very strong cohesive force between mercury molecules there is no adhesive force between mercury molecules and glass i.e. why it didn't wet it.
Adhesion- attractive force between two different bodies (water attached to the glass).
And, mercury in the glass does not wet it or doesn't wet when kept on the table because of very strong cohesive force between mercury molecules there is no adhesive force between mercury molecules and glass i.e. why it didn't wet it.
(1)
Karan said:
10 years ago
Molecules of fluid get attracted due to cohesion.
Example: When you drop a Mercury in to the horizontal surface, it gets gathered due to cohesion. And if you drop a water in surface, it gets wets and flow in all direction, it is due to adhesion.
Mercury is a non-wetting fluid and water is a wetting fluid. So right answer is the option 'C'.
Example: When you drop a Mercury in to the horizontal surface, it gets gathered due to cohesion. And if you drop a water in surface, it gets wets and flow in all direction, it is due to adhesion.
Mercury is a non-wetting fluid and water is a wetting fluid. So right answer is the option 'C'.
Khattak said:
5 years ago
I think the given answer is right because here it is not mentioned that whether they are molecules of same fluids are of different fluids, if we consider the common example of water in a glass, where the glass inner side gets wet, this is because of the water molecules gets attracted towards the glass, which says adhesion occurred.
Achumi kits said:
5 years ago
According to the question it says molecule of fluids (which is plural) that means more than one fluid.
Cohesion: The attraction between a molecule of a fluid (single fluid) ie, singular.
Adhesion: Attraction between different molecules (more than one fluid or fluid to container) ie, plural.
So, the answer is ADHESION.
Cohesion: The attraction between a molecule of a fluid (single fluid) ie, singular.
Adhesion: Attraction between different molecules (more than one fluid or fluid to container) ie, plural.
So, the answer is ADHESION.
(1)
Anomie said:
6 years ago
Let me make it clear and simple:
Adhesion occurs between two different Molecules.
Cohesion occurs between two same Molecules.
In the Question, it says "FLUIDS" not "FLUID"
Which means different Fluids/Molecules.
So the Correct Answer is (C) Adhesion.
Adhesion occurs between two different Molecules.
Cohesion occurs between two same Molecules.
In the Question, it says "FLUIDS" not "FLUID"
Which means different Fluids/Molecules.
So the Correct Answer is (C) Adhesion.
Mohit Masiwal said:
9 years ago
Fluids means different fluids not one fluid. Different fluids molecules attract due to adhesion. And if written attraction between fluid (note here no 's' at end ) so there having same fluid with differnt molecules and so cohesion.
Baloch said:
9 years ago
Actually, both are attractive forces.
Difference is only that adhesive force is an attraction between unlike molecules (eg molecules of water with beaker) and cohesion is between like molecules (molecules of water).
Difference is only that adhesive force is an attraction between unlike molecules (eg molecules of water with beaker) and cohesion is between like molecules (molecules of water).
Inayat Ullah Kakar said:
9 months ago
Here the question asked about fluid not liquid.
Fluid = gases + liquid.
So, the Molecules of fluids get attracted due to adhesion.
Because of two different things gas and liquid.
So, the given answer is correct.
Fluid = gases + liquid.
So, the Molecules of fluids get attracted due to adhesion.
Because of two different things gas and liquid.
So, the given answer is correct.
(4)
Abk22 said:
3 years ago
As for the definitions, the tendency of two or more different molecules to bond with each other is known as Adhesion, whereas the force of attraction between the same molecules is known as Cohesion.
(1)
Nabam Julius said:
8 years ago
Cohesion isvthe property of a material to attract its molecules whereas.
Adhesion is the property to attract other molecules and threfre water does not attract other molecules. So answer is D.
Adhesion is the property to attract other molecules and threfre water does not attract other molecules. So answer is D.
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