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Now WALKING ON WATER IS POSSIBLE ...!!!!
Posted: Wed May 12, 2010 12:04 pm
by Madonna D'souza
[youtube]Oe3St1GgoHQ[/youtube]
Re: Now WALKING ON WATER IS POSSIBLE ...!!!!
Posted: Mon Jun 14, 2010 11:23 am
by mini15
have you seen the ones on YouTube? Walking on water?
Re: Now WALKING ON WATER IS POSSIBLE ...!!!!
Posted: Mon Jun 14, 2010 6:21 pm
by Madonna D'souza
This was the same one on youtube ...!!!
Re: Now WALKING ON WATER IS POSSIBLE ...!!!!
Posted: Tue Jun 22, 2010 12:27 pm
by csahab
ये पूरी तरह से सोच कर बनायीं गयी फिल्म है और मेरा मनना है की इसमे किसी तरह की छेड़छाड की गयी है जिससे लगता है की ये पानी पर चल रहे है ..............
Re: Now WALKING ON WATER IS POSSIBLE ...!!!!
Posted: Wed Jun 23, 2010 6:36 pm
by vikas
its about surface tension of a non-newtonian fluid. See this video:
[youtube]f2XQ97XHjVw[/youtube]
They filled a pool with a mix of cornstarch and water made on a concrete mixer truck. It becomes a non-newtonian fluid. When stress is applied to the liquid it exhibits properties of a solid.
A non-Newtonian fluid is a fluid whose flow properties are not described by a single constant value of viscosity. Many polymer solutions and molten polymers are non-Newtonian fluids, as are many commonly found substances such as ketchup, starch suspensions, paint, blood and shampoo. In a Newtonian fluid, the relation between the shear stress and the strain rate is linear (and if one were to plot this relationship, it would pass through the origin), the constant of proportionality being the coefficient of viscosity. In a non-Newtonian fluid, the relation between the shear stress and the strain rate is nonlinear, and can even be time-dependent. Therefore a constant coefficient of viscosity cannot be defined.
Although the concept of viscosity is commonly used to characterize a material, it can be inadequate to describe the mechanical behavior of a substance, particularly non-Newtonian fluids. They are best studied through several other rheological properties which relate the relations between the stress and strain rate tensors under many different flow conditions, such as oscillatory shear, or extensional flow which are measured using different devices or rheometers. The properties are better studied using tensor-valued constitutive equations, which are common in the field of continuum mechanics.