Physics
Fluid-Mechanics
Easy
Question
A spherical tank of radius R is half filled with oil of density d. If the tank is given a horizontal. Acceleration of a, maximum pressure on the tank is (due to liquid alone or pressure above liquid =0)
The correct answer is:
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A drop of liquid of diameter 2.8 mm breaks up into 125 identical drops. The change in energy is nearly (S.T. of liquid =75 dynes/cm)
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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 |
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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 |
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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
|
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
|
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
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