Aside: Random collisions, momentum transfer and viscosity

[@mohammedouallal2]

Really nice video if it were a lil bit longer, because I think the Prof. wanted to explain more.

[@adosar7261]

If there are forces that speed up one part of the liquid and lower the speed of the other part why the ability to flow depends in viscosity? I mean the net effect would be zero momentum transfer (conservation of momentum) so why viscosity matters?

[@gyanendrasingh3430]

Thats the tricky part 😁 Good curiosity though

[@adosar7261]

@@gyanendrasingh3430 Is it because it loses momentum in the walls of the container?

[@BlissfulKashmir]

That is the case of ideal fluids ....

[@adosar7261]

@@BlissfulKashmir Can you elaborate pease?

[@BlissfulKashmir]

The case you are talking about is the case of ideal fluids where viscosity is zero, further more ut isn't only momentum tranfer that results in deformation in fluid , cohesion of the fluid plays its role.. Also size of the molecules plays the, take the case of water it has strong hydrogen bonds betweeen H and O atoms, but it is less viscous than honey why because size of the molecules is small..