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Physics

Fluid-Mechanics

Easy

Question

A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up with a force of 2 ×10^-2N to keep the wire in equilibrium. The surface tension, in Nm^-1, of water is

0.1
0.2
0.001
0.002

The correct answer is: 0.1

Related Questions to study

Fluid-Mechanics

With regard to dependence of quantities given in column I and II, match the following :

Column - I

Column - II

i.
Young's modules of a substance
a.
Depends on temperature

ii.
Bulk modulus of substance
b.
Depends on length

iii.
Modulus of rigidity of a substance
c.
Depends on area of across section

iv.
Volume of a substance
d.
Depends on the nature of material

With regard to dependence of quantities given in column I and II, match the following :

Column - I

Column - II

i.
Young's modules of a substance
a.
Depends on temperature

ii.
Bulk modulus of substance
b.
Depends on length

iii.
Modulus of rigidity of a substance
c.
Depends on area of across section

iv.
Volume of a substance
d.
Depends on the nature of material

PhysicsFluid-Mechanics

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Match the following

Column - I

Column - II

i.
Splitting of bigger drop into small droplets
a.
Temperature increases

ii.
Formation of bigger drop from small droplets
b.
Temperature in creases

iii.
Spraying of liquid
c.
Surface energy increases

iv.

d.
Surface energy decrease

Match the following

Column - I

Column - II

i.
Splitting of bigger drop into small droplets
a.
Temperature increases

ii.
Formation of bigger drop from small droplets
b.
Temperature in creases

iii.
Spraying of liquid
c.
Surface energy increases

iv.

d.
Surface energy decrease

PhysicsFluid-Mechanics

Fluid-Mechanics

Match the following

Column - I

Column - II

longitudinal stress
a.
Volume changes

Shear stress
b.
Shape changes

Volume changes
c.
Volume does not change

Tensile stress
d.
Shape does not change

Match the following

Column - I

Column - II

longitudinal stress
a.
Volume changes

Shear stress
b.
Shape changes

Volume changes
c.
Volume does not change

Tensile stress
d.
Shape does not change

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n Column L a uniform bar of uniform cross-sectional area under the application of forces is shown in the figure and in Column II, some effects/phenomena are given. Match the entries of Column I with the entries of Column II.

Column - I

Column - II

i.
a.
Uniform stresses developed in the rod

ii.
b.
Non- uniform stresses developed in the rod

iii.
c.
Compressive stress developed

iv.
d.
Tensile stresses developed

n Column L a uniform bar of uniform cross-sectional area under the application of forces is shown in the figure and in Column II, some effects/phenomena are given. Match the entries of Column I with the entries of Column II.

Column - I

Column - II

i.
a.
Uniform stresses developed in the rod

ii.
b.
Non- uniform stresses developed in the rod

iii.
c.
Compressive stress developed

iv.
d.
Tensile stresses developed

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Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a farce, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air-and container can make the angle of contact.
If the excess pressure in a soap bubble is p, the excess pressure in an air bubble is

Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a farce, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air-and container can make the angle of contact.
If the excess pressure in a soap bubble is p, the excess pressure in an air bubble is

PhysicsFluid-Mechanics

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Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a farce, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air-and container can make the angle of contact.
The direction of the excess pressure in the meniscus of a liquid of angle of contact $2 pi divided by 3$ is

Molecular forces exist between the molecules of a liquid in a container. The molecules on the surface have unequal force leading to a tension on the surface. If this is not compensated by a farce, the equilibrium of the liquid will be a difficult task. This leads to an excess pressure on the surface. The nature of the meniscus can inform us of the direction of the excess pressure. The angle of contact of the liquid decided by the forces between the molecules, air-and container can make the angle of contact.
The direction of the excess pressure in the meniscus of a liquid of angle of contact $2 pi divided by 3$ is

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A steel bolt of cross-sectional area $A subscript b equals 5 cross times 10 to the power of negative 5 end exponent straight m squared$ is passed through a cylindrical tube made of aluminium. Cross-sectional area of the tube material is $A subscript t equals 10 to the power of negative 4 end exponent m squared$ and its length is l =50 cm. The bolt is just taut to that there is no stress in the bolt and temperature of the assembly increases through $straight capital delta theta equals 10 to the power of ring operator straight C$ . Given, coefficient of linear thermal expansion of steel, $alpha subscript b equals 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
.
Young 's modulus of steel $Y subscript b equals 2 cross times 10 to the power of ′′ N divided by m squared$
Young's modulus of $A l comma Y subscript t equals 10 to the power of 11 N divided by m squared$ ,coefficient of
linear thermal expansion of $A l alpha subscript t equals 2 cross times 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
The compressive stress in tube is

A steel bolt of cross-sectional area $A subscript b equals 5 cross times 10 to the power of negative 5 end exponent straight m squared$ is passed through a cylindrical tube made of aluminium. Cross-sectional area of the tube material is $A subscript t equals 10 to the power of negative 4 end exponent m squared$ and its length is l =50 cm. The bolt is just taut to that there is no stress in the bolt and temperature of the assembly increases through $straight capital delta theta equals 10 to the power of ring operator straight C$ . Given, coefficient of linear thermal expansion of steel, $alpha subscript b equals 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
.
Young 's modulus of steel $Y subscript b equals 2 cross times 10 to the power of ′′ N divided by m squared$
Young's modulus of $A l comma Y subscript t equals 10 to the power of 11 N divided by m squared$ ,coefficient of
linear thermal expansion of $A l alpha subscript t equals 2 cross times 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
The compressive stress in tube is

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Fluid-Mechanics

A steel bolt of cross-sectional area $A subscript b equals 5 cross times 10 to the power of negative 5 end exponent straight m squared$ is passed through a cylindrical tube made of aluminium. Cross-sectional area of the tube material is $A subscript t equals 10 to the power of negative 4 end exponent m squared$ and its length is l =50 cm. The bolt is just taut to that there is no stress in the bolt and temperature of the assembly increases through $straight capital delta theta equals 10 to the power of ring operator straight C$ . Given, coefficient of linear thermal expansion of steel, $alpha subscript b equals 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
.
Young 's modulus of steel $Y subscript b equals 2 cross times 10 to the power of ′′ N divided by m squared$
Young's modulus of $A l comma Y subscript t equals 10 to the power of 11 N divided by m squared$ ,coefficient of
linear thermal expansion of $A l alpha subscript t equals 2 cross times 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
the compressive strain in tube is

A steel bolt of cross-sectional area $A subscript b equals 5 cross times 10 to the power of negative 5 end exponent straight m squared$ is passed through a cylindrical tube made of aluminium. Cross-sectional area of the tube material is $A subscript t equals 10 to the power of negative 4 end exponent m squared$ and its length is l =50 cm. The bolt is just taut to that there is no stress in the bolt and temperature of the assembly increases through $straight capital delta theta equals 10 to the power of ring operator straight C$ . Given, coefficient of linear thermal expansion of steel, $alpha subscript b equals 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
.
Young 's modulus of steel $Y subscript b equals 2 cross times 10 to the power of ′′ N divided by m squared$
Young's modulus of $A l comma Y subscript t equals 10 to the power of 11 N divided by m squared$ ,coefficient of
linear thermal expansion of $A l alpha subscript t equals 2 cross times 10 to the power of negative 5 end exponent divided by to the power of ring operator straight C$
the compressive strain in tube is

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A long capillary tube of radius 0.2 min is placed vertically inside a beaker of water
If the tube is now pushed into water so that only 5.0 cm of its length is above the surface, then determine the angle of contact between the liquid and glass surface.

A long capillary tube of radius 0.2 min is placed vertically inside a beaker of water
If the tube is now pushed into water so that only 5.0 cm of its length is above the surface, then determine the angle of contact between the liquid and glass surface.

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A long capillary tube of radius 0.2 min is placed vertically inside a beaker of water
If the surface tension of water is $7.2 cross times 10 to the power of negative 2 end exponent N divided by m$ and the angle of contact between
glass and water is zero, then determine the height of the water column in the tube.

A long capillary tube of radius 0.2 min is placed vertically inside a beaker of water
If the surface tension of water is $7.2 cross times 10 to the power of negative 2 end exponent N divided by m$ and the angle of contact between
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A light rod of length L = 2 m is suspended horizontally from the ceiling by two wires A and B of equal lengths. The wire A is made of steel with the area of cross section As $A subscript S equals 1 cross times 10 to the power of negative 5 end exponent straight m squared$ , while the wire B is made of brass of cross-sectional area . $A subscript b equals 2 cross times 10 to the power of negative 5 end exponent straight m squared$ A weight W is suspended at a distance x from the wire A as shown in the figure. Take, Young's modulus of steel and brass as
$Y subscript s equals 2 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent text end text$ and $Y subscript b equals 1 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent$

Determine the value of x so that equal strains are produced in each wire.

A light rod of length L = 2 m is suspended horizontally from the ceiling by two wires A and B of equal lengths. The wire A is made of steel with the area of cross section As $A subscript S equals 1 cross times 10 to the power of negative 5 end exponent straight m squared$ , while the wire B is made of brass of cross-sectional area . $A subscript b equals 2 cross times 10 to the power of negative 5 end exponent straight m squared$ A weight W is suspended at a distance x from the wire A as shown in the figure. Take, Young's modulus of steel and brass as
$Y subscript s equals 2 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent text end text$ and $Y subscript b equals 1 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent$

Determine the value of x so that equal strains are produced in each wire.

PhysicsFluid-Mechanics

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A light rod of length L = 2 m is suspended horizontally from the ceiling by two wires A and B of equal lengths. The wire A is made of steel with the area of cross section As $A subscript S equals 1 cross times 10 to the power of negative 5 end exponent straight m squared$ , while the wire B is made of brass of cross-sectional area . $A subscript b equals 2 cross times 10 to the power of negative 5 end exponent straight m squared$ A weight W is suspended at a distance x from the wire A as shown in the figure. Take, Young's modulus of steel and brass as
$Y subscript s equals 2 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent text end text$ and $Y subscript b equals 1 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent$

Determine the value of x so that equal stresses are produced in each wire.

A light rod of length L = 2 m is suspended horizontally from the ceiling by two wires A and B of equal lengths. The wire A is made of steel with the area of cross section As $A subscript S equals 1 cross times 10 to the power of negative 5 end exponent straight m squared$ , while the wire B is made of brass of cross-sectional area . $A subscript b equals 2 cross times 10 to the power of negative 5 end exponent straight m squared$ A weight W is suspended at a distance x from the wire A as shown in the figure. Take, Young's modulus of steel and brass as
$Y subscript s equals 2 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent text end text$ and $Y subscript b equals 1 cross times 10 to the power of 11 Nm to the power of negative 2 end exponent$

Determine the value of x so that equal stresses are produced in each wire.

PhysicsFluid-Mechanics

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Fluid-Mechanics

A vertical glass capillary tube, open at both ends, contains some water. Which of the following shapes may not be taken by the water in the tube?

A vertical glass capillary tube, open at both ends, contains some water. Which of the following shapes may not be taken by the water in the tube?

PhysicsFluid-Mechanics

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If n drops of a liquid, each with surface energy E, join to form a single drop, then

If n drops of a liquid, each with surface energy E, join to form a single drop, then

PhysicsFluid-Mechanics

Fluid-Mechanics

The wires A and B shown in the figure are made of the same material and have radii ,
$r subscript A$ and $text end text r subscript B$ respectively. The block between them has a mass m. When the fame F is mg/3, one of the wires breaks. Then

The wires A and B shown in the figure are made of the same material and have radii ,
$r subscript A$ and $text end text r subscript B$ respectively. The block between them has a mass m. When the fame F is mg/3, one of the wires breaks. Then

PhysicsFluid-Mechanics

parallel

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