A perfect gas
A. has constant viscosity
B. is incompressible
C. is of theoretical interest
D. none of the above.
Answer: Option C
Solution (By Examveda Team)
A perfect gas is an idealized concept used in fluid mechanics and thermodynamics to simplify analysis.It strictly follows the ideal gas laws and assumes conditions such as no intermolecular forces and perfect elasticity of molecules.
In reality, no gas satisfies all these assumptions, so a perfect gas is not incompressible and does not have constant viscosity under all conditions.
Therefore, a perfect gas is mainly of theoretical interest, making option C the correct answer.
This Question Belongs to Civil Engineering >> Hydraulics And Fluid Mechanics
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A. 22.5 m/sec.
B. 33 m/sec.
C. 40 m/sec.
D. 90 m/sec.
A. the weight of the body
B. more than the weight of the body
C. less than the weight of the body
D. weight of the fluid displaced by the body
The difference of pressure between the inside and outside of a liquid drop is
A. $${\text{p}} = {\text{T}} \times {\text{r}}$$
B. $${\text{p}} = \frac{{\text{T}}}{{\text{r}}}$$
C. $${\text{p}} = \frac{{\text{T}}}{{2{\text{r}}}}$$
D. $${\text{p}} = \frac{{2{\text{T}}}}{{\text{r}}}$$
A. cannot be subjected to shear forces
B. always expands until it fills any container
C. has the same shear stress.at a point regardless of its motion
D. cannot remain at rest under action of any shear force
A theoretical model with no intermolecular forces and point-sized molecules.Obeys the ideal gas law (PV=nRT).Molecules have random motion and elastic collisions.It's a compressible fluid, not an incompressible one.