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What are the applications of principles of flotation?

Important Questions on Fluids

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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
A metal sphere is dipped in water. If at 0 °C & 4 °C  the buoyancies in water are β1 and β2 respectively, then :
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Two metal pieces when immersed in liquid experience equal upthrust on them, then :
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
The density of kerosene is 800kg m-3. Its relative density is
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
A block floats with its fraction ηE inside water when immersed in a beaker containing water and kept on the earth. The beaker along with the block is shifted to the surface of the moon. If ηM is the fraction of the block now immersed in water, which of the following relations is correct? 
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
When a floating body is pressed down a little, which of the two will increase - weight or upthrust?
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
When an object is immersed fully or partly in a liquid, the apparent loss in its weight is 
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
A given solid is weighed in air using a spring balance. It is then weighed by immersing it fully, in each of the three vessels containing water, as shown. Its weight when immersed, will be
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation

In an experiment to establish the relation between loss in weight of an immersed solid with the weight of water displaced by it, the correct set-up is shown in figure is :

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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
What are the applications of Archimedes' principle?
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation

Give reasons: It is easier to swim in the sea than in the river.

MEDIUM
Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Why is a bucket of water lighter when in water than when it is taken out of water?
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Buoyant force acting on an object immersed in a fluid will always act 
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Why is the force needed to keep a block of cork inside water?
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Three students A, B, and C determined the volume of the solid by immersing it in water in the overflow cans set-up as shown. The result obtained will be wrong for
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Why are the chances of drowning in the Dead Sea very less?
MEDIUM
Science>Physics>Fluids>Density and Relative Density and Laws of Flotation

Four students A, B, C and D wanted to determine the volume of an object by using an overflow can. Which student has made the correct set-up?

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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation

Give reasons: A body experiences more buoyant force on the earth than on the moon.

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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
In the experiment to establish a relation between the loss in weight of a body with the weight of water displaced by it, which is the correct precaution?
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Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
The maximum loss in weight of a body is when
MEDIUM
Science>Physics>Fluids>Density and Relative Density and Laws of Flotation
Why are the chances of drowning in the Dead Sea very less?