Physics-
General
Easy
Question
In this figure, an ideal liquid flows through the tube, which is of uniform cross-section. The liquid has velocities 
and 
, and pressure 
and 
at points A and B respectively
The correct answer is:
Related Questions to study
Physics-
A closed rectangular tank is completely filled with water and is accelerated horizontally with an acceleration a towards right. Pressure is maximum at ____________
A closed rectangular tank is completely filled with water and is accelerated horizontally with an acceleration a towards right. Pressure is maximum at ____________
Physics-General
Physics-
A large open top container of negligible mass and uniform cross-sectional area A has a small hole of cross-sectional area A/100 in its side wall near the bottom. The container is kept on a smooth horizontal floor and contains a liquid of density 
and mass 
. Assuming that the liquid starts flowing out horizontally through the hole at t=0, calculate the acceleration of the container.
A large open top container of negligible mass and uniform cross-sectional area A has a small hole of cross-sectional area A/100 in its side wall near the bottom. The container is kept on a smooth horizontal floor and contains a liquid of density and mass . Assuming that the liquid starts flowing out horizontally through the hole at t=0, calculate the acceleration of the container.
Physics-General
Physics-
A horizontal tube has different cross-section at two points A and B The diameters of the tube at points A and B are 4 cm and 2 cm respectively. The two manometers arms are fixed at points A and B. When a liquid of density 
flows through the tube, the difference of pressure between the arms of manometer is 8 cm. Calculate the rate of flow of liquid nearly, deriving the necessary formula 
A horizontal tube has different cross-section at two points A and B The diameters of the tube at points A and B are 4 cm and 2 cm respectively. The two manometers arms are fixed at points A and B. When a liquid of density flows through the tube, the difference of pressure between the arms of manometer is 8 cm. Calculate the rate of flow of liquid nearly, deriving the necessary formula
Physics-General
Physics-
Figure shows how the stream of water emerging from a faucet "necks down" as it falls. Figure shows two levels separated by a vertical distance h. The cross-sectional areas 
and A are marked in the figure. At what rate does water flow from the tap?
Figure shows how the stream of water emerging from a faucet "necks down" as it falls. Figure shows two levels separated by a vertical distance h. The cross-sectional areas and A are marked in the figure. At what rate does water flow from the tap?
Physics-General
Physics-
Figure shows a U-tube of uniform cross-sectional area A accelerated with acceleration a as shown. If d is the separation between the limbs, then what is the difference in the level of the liquid in the U-tube ?
Figure shows a U-tube of uniform cross-sectional area A accelerated with acceleration a as shown. If d is the separation between the limbs, then what is the difference in the level of the liquid in the U-tube ?
Physics-General
Physics-
A ball of radius r and density falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is 
, the value of h is given by
A ball of radius r and density falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is , the value of h is given by
Physics-General
Physics-
Two capillary tubes of equal length and inner radii 2r and 4r respectively are added in series and a liquid flows through it. If the pressure difference between the ends of the whole system is 8.5 cm of mercury, find the pressure difference between the two ends of the first capillary tube.
Two capillary tubes of equal length and inner radii 2r and 4r respectively are added in series and a liquid flows through it. If the pressure difference between the ends of the whole system is 8.5 cm of mercury, find the pressure difference between the two ends of the first capillary tube.
Physics-General
Physics-
A metal ball of radius 'r' and density 'd' travels with a terminal velocity 'v' in a liquid of density d/4. The terminal velocity of another ball of radius '2r' and density ' 3 d ' in the same liquid is
A metal ball of radius 'r' and density 'd' travels with a terminal velocity 'v' in a liquid of density d/4. The terminal velocity of another ball of radius '2r' and density ' 3 d ' in the same liquid is
Physics-General
Physics-
In a surface tension experiment, the lower end of a capillary tube of radius r is placed vertically in water. It is observed that with rise in water heat is evolved. When liquid rises to a height of 2 cm, the angle of contact is zero. If the tube is depressed more now so that the top of the capillary is only 1 cm above the liquid, the angle of contact changes. If the same experiment is repeated in an artificial satellite, still water rises. If water rises to height h, the heat evolved is? ( d is the density of water)
In a surface tension experiment, the lower end of a capillary tube of radius r is placed vertically in water. It is observed that with rise in water heat is evolved. When liquid rises to a height of 2 cm, the angle of contact is zero. If the tube is depressed more now so that the top of the capillary is only 1 cm above the liquid, the angle of contact changes. If the same experiment is repeated in an artificial satellite, still water rises. If water rises to height h, the heat evolved is? ( d is the density of water)
Physics-General
Physics-
Consider a small surface area of 
at the top of a mercury drop of radius 4 mm. If atmospheric pressure 
p and surface tension of mercury 0.465 N/m. Neglect the effect of gravity The force exerted on this area by the mercury surface in contact with it
Consider a small surface area of at the top of a mercury drop of radius 4 mm. If atmospheric pressure p and surface tension of mercury 0.465 N/m. Neglect the effect of gravity The force exerted on this area by the mercury surface in contact with it
Physics-General
Physics-
The capillaries shown in figure have inner radii 0.5 mm,1.0 mm and 1.5 mm respectively. The liquid in the beaker is water. Find the heights of water level in the capillaries. The surface tension of water is 
.
The capillaries shown in figure have inner radii 0.5 mm,1.0 mm and 1.5 mm respectively. The liquid in the beaker is water. Find the heights of water level in the capillaries. The surface tension of water is .
Physics-General
Physics-
A liquid is contained in a vertical tube of semicircular cross-section. The contact angle is zero. The force of surface tension on the curved part and on the flat part are in ratio
A liquid is contained in a vertical tube of semicircular cross-section. The contact angle is zero. The force of surface tension on the curved part and on the flat part are in ratio
Physics-General
Physics-
The inter molecular forces of attraction within a liquid gives rise to a phenomenon known as surface tension. On the basis of molecular theory the molecules of the liquid molecules tends to attain almost a spherical shape. However for large drops the shape is not perfectly spherical. The free energy contained in a liquid surface per unit area is surface tension. If a capillary tube is immersed or kept in contact with a liquid surface, the liquid rises or falls in capillary tube when compared to the level of liquid in out side. The rise or fall depends on the cohesive and adhesive forces. A container of width 
is filled with a liquid. A thin wire of mass per unit length 
is gently placed on the middle of the surface as shown in fig. As a result the liquid surface is depressed by a distance y. The surface tension of liquid is given by
The inter molecular forces of attraction within a liquid gives rise to a phenomenon known as surface tension. On the basis of molecular theory the molecules of the liquid molecules tends to attain almost a spherical shape. However for large drops the shape is not perfectly spherical. The free energy contained in a liquid surface per unit area is surface tension. If a capillary tube is immersed or kept in contact with a liquid surface, the liquid rises or falls in capillary tube when compared to the level of liquid in out side. The rise or fall depends on the cohesive and adhesive forces. A container of width is filled with a liquid. A thin wire of mass per unit length is gently placed on the middle of the surface as shown in fig. As a result the liquid surface is depressed by a distance y. The surface tension of liquid is given by
Physics-General
Physics-
A light open rigid wire frame floats on the surface of water as shown in fig. What force will act on the frame due to surface, immediately after some soap solution is dropped inside it 
and 
are the surface tensions of water and soap solutions respectively 
.
A light open rigid wire frame floats on the surface of water as shown in fig. What force will act on the frame due to surface, immediately after some soap solution is dropped inside it and are the surface tensions of water and soap solutions respectively .
Physics-General
Physics-
A soap bubble has radius R and thickness d(<<R) as shown. It collapses into a spherical drop. The ratio of excess pressure in the drop to the excess pressure inside the bubble is
A soap bubble has radius R and thickness d(<<R) as shown. It collapses into a spherical drop. The ratio of excess pressure in the drop to the excess pressure inside the bubble is
Physics-General
