Physics
Fluid-Mechanics
Easy
Question
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
- 1
- 7/8
- 8/7
- 8/9
The correct answer is: 8/7
Related Questions to study
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
Physics
There is an air bubble of radius R inside a drop of water of radius 3R. Find the ratio of gauge pressure at point B to that at point A.
There is an air bubble of radius R inside a drop of water of radius 3R. Find the ratio of gauge pressure at point B to that at point A.
PhysicsFluid-Mechanics
Physics
Iceberg floats in sea water with a part of it submerged. The percentage fraction of the ice berg submerged is (Density of ice 
, density of sea water 
)
Iceberg floats in sea water with a part of it submerged. The percentage fraction of the ice berg submerged is (Density of ice , density of sea water )
PhysicsFluid-Mechanics
Physics
A body weights 150 kg in air, 120 g in water and 130 g in a liquid. The density of liquid in 
is
A body weights 150 kg in air, 120 g in water and 130 g in a liquid. The density of liquid in is
PhysicsFluid-Mechanics
Physics
A steel block having an internal cavity weighs 234 g in air and 197 g in water. If the density of steel is 7 .8 g cm-3, then the volume of the cavity is
A steel block having an internal cavity weighs 234 g in air and 197 g in water. If the density of steel is 7 .8 g cm-3, then the volume of the cavity is
PhysicsFluid-Mechanics
Physics
A piece of brass (Cu and Zn) weighs 12.9 g in air. When completely immersed in water, it weighs 11.3g. Then relative densities of Cu and Zn are 8.9 and 7.1 respectively. The mass of copper in the alloy is
A piece of brass (Cu and Zn) weighs 12.9 g in air. When completely immersed in water, it weighs 11.3g. Then relative densities of Cu and Zn are 8.9 and 7.1 respectively. The mass of copper in the alloy is
PhysicsFluid-Mechanics
Physics
A 0.5 kg block of brass (density; 
) is suspended from a string. What is the tension in the string if the block is completely immersed in water?
A 0.5 kg block of brass (density; ) is suspended from a string. What is the tension in the string if the block is completely immersed in water?
PhysicsFluid-Mechanics
