EASY
JEE Advanced
IMPORTANT
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An iceberg is floating partially immersed in seawater. The density of seawater is 1.03 g cm3 and that of ice is 0.92 g cm3 . The approximate percentage of the total volume of iceberg above the level of seawater is -

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Important Questions on Fluid Mechanics

EASY
JEE Advanced
IMPORTANT
Equal masses of three liquid are kept in three identical cylindrical vessels A, B and C. Their densities are ρA, ρB and ρC with ρA<ρB<ρC. The force on the base will be
EASY
JEE Advanced
IMPORTANT
A lawn sprinkler has 20 holes, each of cross-sectional area 2.0×10-2 cm2 and is connected to a hosepipe of cross-sectional area 2.4 cm2. If the speed of water in the hose-pipe is 1.5 m s-1, the speed of water as it emerges from the holes is,
EASY
JEE Advanced
IMPORTANT
A block of silver of mass 4 kg hanging from a string is immersed in a liquid of relative density 0.72. If relative density of silver is 10, then tension in the string will be: [ take g=10 m s-2]
EASY
JEE Advanced
IMPORTANT
A vessel contains oil (density=0.8 g cm-3) over mercury (density=13.6 g cm-3). A uniform sphere floats with half its volume immersed in mercury and the other half in oil. The density of the material of the sphere (in g cm-3) is
EASY
JEE Advanced
IMPORTANT
A sealed tank containing a liquid of density ρ moves with a horizontal acceleration a, as shown in the figure. The difference in pressure between the points A and B is
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EASY
JEE Advanced
IMPORTANT
An empty balloon weighs W1. If air equal in weight to W is pumped into the balloon. The weight of the balloon becomes W2. suppose that the density of air inside and outside the balloon is the same. Then
MEDIUM
JEE Advanced
IMPORTANT
A wooden block is floating in a liquid. About 50% of its volume is inside the liquid when the vessel is stationary. Percentage volume when the vessel moves upwards with acceleration a=g/2 is
EASY
JEE Advanced
IMPORTANT
A cylindrical block is floating (partially submerged) in a vessel containing water. Initially, the platform on which the vessel is mounted is at rest. Now the platform along with the vessel is allowed to fall freely under gravity. As a result, the buoyancy force