Related Questions

In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.
A Directly proportional to
B Inversely proportional to
C Inversely proportional to the square root of
D Independent of
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 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
একটি কণা t = 0 সময়ে স্থির অবস্থা থেকে যাত্রা শুরু করে। কণাটির ওপর প্রযুক্ত লব্ধি বল, সময় t এর সমানুপাতিক। কণাটির গতিশক্তি নিচের কোনটির সমানুপাতিক হবে? (A particle starts from rest at t = 0. The net force acting on the particle is proportional to time t. Its kinetic energy is proportional to which one of the following?)
A t2
B t3
C t
D t4
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
For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is
A More
B Less
C Equal
D More or less, depending on the type of particle

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