If the stress component ?xx is given by ? xx = ?p + 2? ?u/?x , the incompressible fluid is:
(A) Linear and isotropic
(B) Isotropic and homogeneous
(C) Linear and homogeneous
(D) Linear, isotropic, and homogeneous
(A) Linear and isotropic
The fluid is homogeneous if fluid properties, such as ?, do not depend on position. That leaves only (A) as a possibility. The fluid must be linear, that is, there must be a linear relation between the velocity and the stress components. It must also be isotropic, i.e., it must have the same properties in all directions at a given point in the flow.
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What will be an ideal response?
An object is moving with constant non-zero velocity on the +x axis. The velocity versus time graph of this object is
A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.
As shown in the figure, a container has a vertical tube, whose inner radius is 32.00 mm, connected to it at its side. An unknown liquid reaches level A in the container and level B in the tube level A being 5.0 cm higher than level B. The liquid supports a 20.0 cm high column of oil, between levels B and C, whose density is 460 kg.m-3. What is the density of the unknown liquid?
A. 1800 kg/m3
B. 1600 kg/m3
C. 1400 kg/m3
D. 2000 kg/m3
E. 1700 kg/m3
The quark and antiquark in a meson are always of the same flavor
a. True b. False Indicate whether the statement is true or false