Get 2 FREE Instant-Explanations on Filo with code FILOAPP

Home

A powder comprising particles of various sizes is stirred up i

Question

A powder comprising particles of various sizes is stirred up in a vessel filled to a height of 10 cm with water. Assuming the particles to be spherical, find the size of the largest particle that will remain in suspension after 1 h (density of powder = 4 $g / c m^{3}$ , viscosity of water = 0.01 poise).

Views: 912 students

Found 5 tutors discussing this question

Mateo Discussed

A powder comprising particles of various sizes is stirred up in a vessel filled to a height of 10 cm with water. Assuming the particles to be spherical, find the size of the largest particle that will remain in suspension after 1 h (density of powder = 4

g / c m^{3}

, viscosity of water = 0.01 poise).

8 mins ago

Discuss this question LIVE

8 mins ago

Text solutionVerified

Terminal velocity of the largest particle which is just about to settle at the bottom of the
Vessel is

v_{r} = \frac{10 \times 1 0 ^{- 2}}{3600} m / s

Let r be the radius of that particle. Then

v_{r} = \frac{2}{9} r^{2} \frac{( σ - ρ )}{η} g

where

σ = 4 \times 1 0^{3} k g / m^{2} an d η = \frac{0.01}{10} N s / m^{3}

After solving, we get r = 2.0

\times 1 0^{- 6}

Was this solution helpful?

150

Report

One destination for complete JEE/NEET preparation

One destination to cover all your homework and assignment needs

Learn Practice Revision Succeed

Instant 1:1 help, 24x7

60, 000+ Expert tutors

Textbook solutions

Big idea maths, McGraw-Hill Education etc

Essay review

Get expert feedback on your essay

Schedule classes

High dosage tutoring from Dedicated 3 experts

Trusted by 4 million+ students

Stuck on the question or explanation?

Connect with our physics tutors online and get step by step solution of this question.

231 students are taking LIVE classes

Question Text	A powder comprising particles of various sizes is stirred up in a vessel filled to a height of 10 cm with water. Assuming the particles to be spherical, find the size of the largest particle that will remain in suspension after 1 h (density of powder = 4 $g / c m^{3}$ , viscosity of water = 0.01 poise).
Answer Type	Text solution:1
Upvotes	150

A powder comprising particles of various sizes is stirred up in a vessel filled to a height of 10 cm with water. Assuming the particles to be spherical, find the size of the largest particle that will remain in suspension after 1 h (density of powder = 4 g/cm3, viscosity of water = 0.01 poise).

Text solutionVerified

Practice questions from similar books