Physics
Fluid-Mechanics
Easy
Question
Two cylinders of same area of cross section and together to form a cylinder of length L but made of two materials of densities d1 and d2 are connected together to from a cylinder of length 2L. The combination floats in a liquid of density d with a length L/2 above the surface of the liquid, If 
and difference in densities of two cylinders is equal to density of the liquid
The correct answer is:
Related Questions to study
Physics
A cone of height h, radius r and density d1 is floating in a liquid of density d12. If depth of immersion of cone is y and 
A cone of height h, radius r and density d1 is floating in a liquid of density d12. If depth of immersion of cone is y and
PhysicsFluid-Mechanics
Physics
Two immiscible liquids of densities d and 2d with heights h and 2h respectively push a vertical plate as shown. If b is width of the plate, total side thrust given by liquids on the vertical plate will be
Two immiscible liquids of densities d and 2d with heights h and 2h respectively push a vertical plate as shown. If b is width of the plate, total side thrust given by liquids on the vertical plate will be
PhysicsFluid-Mechanics
Physics
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)
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)
PhysicsFluid-Mechanics
Physics
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)
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)
PhysicsFluid-Mechanics
Physics
Two droplets merge with each other and forms a large droplet. In this process
Two droplets merge with each other and forms a large droplet. In this process
PhysicsFluid-Mechanics
Physics
The potential energy of a molecule on the surface of liquid compared to one inside the liquid is
The potential energy of a molecule on the surface of liquid compared to one inside the liquid is
PhysicsFluid-Mechanics
Physics
Energy needed in breaking a drop of radius R into n drops of radii r is given by
Energy needed in breaking a drop of radius R into n drops of radii r is given by
PhysicsFluid-Mechanics
Physics
The force required to take away a flat circular plate of radius 2 cm from the surface of water, will be (the surface tension of water is 70 dyne/cm)
The force required to take away a flat circular plate of radius 2 cm from the surface of water, will be (the surface tension of water is 70 dyne/cm)
PhysicsFluid-Mechanics
Physics
A wooden stick 2m long is floating on the surface of water. The surface tension of water 0.07 N/m. By putting soap solution on one side of the sticks the surface tension is reduced to 0.06 N/m. The net force on the stick will be
A wooden stick 2m long is floating on the surface of water. The surface tension of water 0.07 N/m. By putting soap solution on one side of the sticks the surface tension is reduced to 0.06 N/m. The net force on the stick will be
PhysicsFluid-Mechanics
Physics
The force required to separate two glass plates of area 
with a film of water 0.05 mm thick between them, is (Surface tension of water is 
The force required to separate two glass plates of area with a film of water 0.05 mm thick between them, is (Surface tension of water is
PhysicsFluid-Mechanics
Physics
It is easy to wash clothes in hot water because its
It is easy to wash clothes in hot water because its
PhysicsFluid-Mechanics
Physics
It is easy to wash clothes in hot water because its
It is easy to wash clothes in hot water because its
PhysicsFluid-Mechanics
Physics
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
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
PhysicsFluid-Mechanics
Physics
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
Physics
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
