Physics
Fluid-Mechanics
Easy
Question
A sphere of solid material of relative density 9 has a concentric spherical cavity and sinks in water. If the radius of the sphere be R, then the radius of the cavity (r) will be related to R as related to R as
The correct answer is:
Related Questions to study
Physics
Two blocks A and B are made of different kinds of wood. Block A floats in with 
its above the surface of water. Block B floats in water with 
of volume below the surface of water. The ratio of the densities of A and B is
Two blocks A and B are made of different kinds of wood. Block A floats in with
its above the surface of water. Block B floats in water with of volume below the surface of water. The ratio of the densities of A and B is
PhysicsFluid-Mechanics
Physics
A candle of diameter d is floating on a liquid in a cylindrical container of diameter D(D>>d) as
A candle of diameter d is floating on a liquid in a cylindrical container of diameter D(D>>d) as
PhysicsFluid-Mechanics
Physics
A wooden cylinder of diameter 4r, height h and density 
is kept on a hole of diameter 2r of tank, filled with liquid of density 
The block in the above question is maintained at the position by external means and the level of liquid is lowered. The height h2 when this external force reduces to zero is
A wooden cylinder of diameter 4r, height h and density is kept on a hole of diameter 2r of tank, filled with liquid of density
The block in the above question is maintained at the position by external means and the level of liquid is lowered. The height h2 when this external force reduces to zero is
PhysicsFluid-Mechanics
Physics
A wooden cylinder of diameter 4r, height h and density is kept on a hole of diameter 2r of tank, filled with liquid of density as shown in the figure.
Now level of the liquid starts decreasing slowly. When the level of liquid is at a height h1 above the cylinder the block starts moving up. At what value of h1 will the block rise?
A wooden cylinder of diameter 4r, height h and density is kept on a hole of diameter 2r of tank, filled with liquid of density as shown in the figure.
Now level of the liquid starts decreasing slowly. When the level of liquid is at a height h1 above the cylinder the block starts moving up. At what value of h1 will the block rise?
PhysicsFluid-Mechanics
Physics
A sphere is just immersed in a liquid. The ratio of hydrostatic force acting on top and bottom half of the sphere will be
A sphere is just immersed in a liquid. The ratio of hydrostatic force acting on top and bottom half of the sphere will be
PhysicsFluid-Mechanics
Physics
A solid sphere of radius ' R ' has a concentric cavity of radius 'R/2' inside it. The sphere is found to just float in water with the highest point of it touch the water surface. The specific gravity of the material of the sphere is
A solid sphere of radius ' R ' has a concentric cavity of radius 'R/2' inside it. The sphere is found to just float in water with the highest point of it touch the water surface. The specific gravity of the material of the sphere is
PhysicsFluid-Mechanics
Physics
The radii of two soap bubbles are R1 and R2 respectively. The ratio of masses of air in then will be
The radii of two soap bubbles are R1 and R2 respectively. The ratio of masses of air in then will be
PhysicsFluid-Mechanics
Physics
If the work done in blowing a soap bubble of volume V is W, then the work done in blowing a soap bubble of volume 2V will be
If the work done in blowing a soap bubble of volume V is W, then the work done in blowing a soap bubble of volume 2V will be
PhysicsFluid-Mechanics
Physics
If two soap bubbles of different radii are in communication with each other
If two soap bubbles of different radii are in communication with each other
PhysicsFluid-Mechanics
Physics
If n identical drops of mercury are combined to form a bigger drop, then the capacity of bigger drop, if capacity of each drop of mercury C, is
If n identical drops of mercury are combined to form a bigger drop, then the capacity of bigger drop, if capacity of each drop of mercury C, is
PhysicsFluid-Mechanics
Physics
Two soap bubbles with radii r1 and r2 (r1>r2) come in contact. Their common surface has a radius of curvature
Two soap bubbles with radii r1 and r2 (r1>r2) come in contact. Their common surface has a radius of curvature
PhysicsFluid-Mechanics
Physics
Two very wide parallel glass plates are held vertically at a small separation d and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, p0 = atmospheric pressure, p = pressure of water just below the water surface in the region between the plates. Then (assume hemispherical meniscus)
Two very wide parallel glass plates are held vertically at a small separation d and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, p0 = atmospheric pressure, p = pressure of water just below the water surface in the region between the plates. Then (assume hemispherical meniscus)
PhysicsFluid-Mechanics
Physics
A liquid drop at temperature T, isolated from its surroundings, breaks into several droplets. The temperature of the droplets will be
A liquid drop at temperature T, isolated from its surroundings, breaks into several droplets. The temperature of the droplets will be
PhysicsFluid-Mechanics
Physics
PhysicsFluid-Mechanics
Physics
Work done in splitting a drop of water of 1 mm radius into 64 droplets is (Surface tension of water is 
)
Work done in splitting a drop of water of 1 mm radius into 64 droplets is (Surface tension of water is )
PhysicsFluid-Mechanics
