In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.

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

In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.

Related Questions