The relations between shear stress \[\left( \tau \right)\] and velocity gradient for ideal fluids, Newtonian fluids and non-Newtonian fluids are given below. Select the correct combination:

\[\tau =\mu \,\left( \frac{du}{dy} \right)\,\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{3}}\]

\[\tau =0\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dv} \right)}^{3}}\]

\[\tau =0\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}}\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}}\]

\[\tau =\mu \,\left( \frac{du}{dy} \right)\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =0\]

The relations between shear stress \[\left( \tau \right)\] and veloc

1.	The relations between shear stress \[\left( \tau \right)\] and velocity gradient for ideal fluids, Newtonian fluids and non-Newtonian fluids are given below. Select the correct combination:
A.	\[\tau =0\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dv} \right)}^{3}}\]
B.	\[\tau =0\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}}\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}}\]
C.	\[\tau =\mu \,\left( \frac{du}{dy} \right)\,\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{3}}\]
D.	\[\tau =\mu \,\left( \frac{du}{dy} \right)\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =0\]
Answer» C. \[\tau =\mu \,\left( \frac{du}{dy} \right)\,\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{3}}\]

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