Related Questions

In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.
A Inverse
B Square root
C Second power
D First power
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the
A Inverse of fluid viscosity
B Square of particle size
C Difference in the densities of the particle & fluid
D All of the above
The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to (where r is the distance of’the particle from centre of the earth)
A log r
B r
C r2
D $$\frac{1}{{\text{r}}}$$
In Newton's law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is
A 0.44
B 0.044
C 4.4
D 44
The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is
A 0.5
B 1
C 2
D 0.33
Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is
A $$\frac{{24}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
B $$\frac{{16}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
C $$\frac{{64}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
D $$\frac{{48}}{{{{\text{N}}_{{\text{Re,p}}}}}}$$
Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity?
A Sphere
B Cube
C Cylinder (L/D = 1)
D Raschig rings
Rain drops falling through atmospheric air attain limited terminal velocity, because of
A Upward thrust due to air
B Viscous force exerted by air
C Surface tension effects of water
D Force of gravity
__________ forces act on a particle moving through a stationary fluid.
A Gravity
B Drag
C Buoyant
D All of the above
Which law/principle of solid mechanics is similar/equivalent to Newton's law of viscosity in fluid mechanics?
A Archimedes principle
B Newton
C Hooke
D Newton

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