(A) The surface tension may be assumed to be a result of force bet | Filo

DOWNLOAD APPMICRO CLASSPDFsBLOGBECOME A TUTORHOME

HOME BECOME A TUTOR BLOG PDFs MICRO CLASS DOWNLOAD APP

Class 11 Physics Mechanics Mechanical Properties of Fluids

(A) The surface tension may be assumed to be a result of force between dipoles which oppose penetration of the liquid.
(B) The surface tension is a result of cohesive force which is mechanical, not electrical.

(a)

both A and B are correct

(b)

A is correct but B is wrong

(c)

A is wrong but B is correct

(d)

both A and B are wrong.

Correct answer: (b)

Solution: Surface tension is exposed, for example, any time an object or insect that is denser than water is able to float or run along the water surface. So we may be assumed that surface tension will be a result of force between dipoles which oppose penetration of the liquid.
The surface tension is a result of both cohesive force and adhesive force.

widgit image

Connecting you to a tutor in 60 seconds.

Get answers to your doubts.

widgit image

Connecting you to a tutor in 60 seconds.

Get answers to your doubts.

image to download the app

Similar topics

mechanical properties of fluids

laws of motion

oscillations

systems of particles and rotational motion

energy and power

widgit image

Connecting you to a tutor in 60 seconds.

Get answers to your doubts.

widgit image

Connecting you to a tutor in 60 seconds.

Get answers to your doubts.

image to download the app

mechanical properties of fluids

laws of motion

oscillations

systems of particles and rotational motion

energy and power

Related Questions

A small ball of mass m and density

ρ

is dropped in a viscous liquid having a density

ρ_{0}

. After some time, the ball falls with a constant velocity. Calculate viscous force acting on the ball.

play button image

A Newtonian fluid fills the clearance between a shaft and a sleeve. When a force of

800 N

is applied to the shaft, parallel to the sleeve, the shaft speed of

1.5 c m / s e c

. If a force of

2.4 k N

is applied instead, the shaft would move with a speed of

play button image

2.5 c m

wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area

0.5 m^{2}

just midway the surfaces at a speed of

0.5 m / s e c

1 N

. The coefficient of viscosity in

k g s / m^{2}

play button image

A plate of area 100

c m^{2}

is placed on the upper surface of castor oil, 2 mm thick. Taking the coefficient of viscosity to be 15.5 poise , calculate the horizontal force necessary to move the plate with a velocity 3 cm

s^{- 1} .

play button image

A rectangular metal plate has dimensions of

10 c m \times 20 c m

. A thin film of oil separates the plate from a fixed horizontal surface. The separation between the rectangular plate and the horizontal surface is 0.2 mm. An ideal string is attached to the plate and passes over an ideal pulley to a mass m. When

m = 125 g m

, the metal plate moves at constant speed of 5 cm/s across the horizontal surface. Then the coefficient of viscosity of oil in

d y n e - s / c m^{2}

(U s e g = 1000 c m / s^{2})

:

play button image

A small sphere of radius r falls from rest in a viscous liquid . As a result , heat is produced due to viscous force . The rate of production of heat when the sphere attains its terminal velocity , is proportional to

play button image

A long cylinder of radius

R_{1}

is displaced along its axis with a constant velocity

v_{0}

inside a stationary co-axial cylinder of radius

R_{2}

. The space between the cylinders is filled with viscous liquid. The velocity of the liquid as a function of the distance

r

from the axis of the cylinders is

v = v_{0} \frac{ln \frac{k}{R _{2}}}{ln \frac{R _{1}}{R _{2}}}

k

play button image

Two equal drops of water are falling through air with. steady velocity v. If the drops coalesced, what will be the new velocity ?

play button image

Related Questions

A small ball of mass m and density

ρ

is dropped in a viscous liquid having a density

ρ_{0}

. After some time, the ball falls with a constant velocity. Calculate viscous force acting on the ball.

play button image

A Newtonian fluid fills the clearance between a shaft and a sleeve. When a force of

800 N

is applied to the shaft, parallel to the sleeve, the shaft speed of

1.5 c m / s e c

. If a force of

2.4 k N

is applied instead, the shaft would move with a speed of

play button image

2.5 c m

wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area

0.5 m^{2}

just midway the surfaces at a speed of

0.5 m / s e c

1 N

. The coefficient of viscosity in

k g s / m^{2}

play button image

A plate of area 100

c m^{2}

is placed on the upper surface of castor oil, 2 mm thick. Taking the coefficient of viscosity to be 15.5 poise , calculate the horizontal force necessary to move the plate with a velocity 3 cm

s^{- 1} .

play button image

A rectangular metal plate has dimensions of

10 c m \times 20 c m

. A thin film of oil separates the plate from a fixed horizontal surface. The separation between the rectangular plate and the horizontal surface is 0.2 mm. An ideal string is attached to the plate and passes over an ideal pulley to a mass m. When

m = 125 g m

, the metal plate moves at constant speed of 5 cm/s across the horizontal surface. Then the coefficient of viscosity of oil in

d y n e - s / c m^{2}

(U s e g = 1000 c m / s^{2})

:

play button image

A small sphere of radius r falls from rest in a viscous liquid . As a result , heat is produced due to viscous force . The rate of production of heat when the sphere attains its terminal velocity , is proportional to

play button image

A long cylinder of radius

R_{1}

is displaced along its axis with a constant velocity

v_{0}

inside a stationary co-axial cylinder of radius

R_{2}

. The space between the cylinders is filled with viscous liquid. The velocity of the liquid as a function of the distance

r

from the axis of the cylinders is

v = v_{0} \frac{ln \frac{k}{R _{2}}}{ln \frac{R _{1}}{R _{2}}}

k

play button image

Two equal drops of water are falling through air with. steady velocity v. If the drops coalesced, what will be the new velocity ?

play button image

Home
Blog
Micro Class
PDFs
Become a Tutor
Download App

About Us
Contact Us
Privacy Policy

Copyright FILO EDTECH PVT. LTD. 2021

Home
Blog
Micro Class
PDFs
Become a Tutor
Download App

About Us
Contact Us
Privacy Policy

Copyright FILO EDTECH PVT. LTD. 2021