Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 11

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In a hydraulic lift , $F_{1}$ and $F_{2}$ are the force acting on the small piston and large piston having radii $r_{1}$ and $r_{2}$ respectively, then

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Important Questions on Fluid Mechanics

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 12

One ton stone is put on a larger piston of diameter

40 cm

of a hydraulic lift and a pressure

P

has to be applied on the smaller piston of diameter

2 cm

, to lift the stone. The pressure

P

, is approximately

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 13

A scientist stated the following law: "Pressure applied to an enclosed fluid is transmitted undiminished to every point of the fluid and the walls of containing vessel". Who is that scientist?

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 14

A cubical block of side

0.5 m

floats on water with

30 %

of its volume under water. What is the maximum weight that can be put on the block without fully submerging it under water?
[Take, density of water

= 10^{3} k g / m^{3}

]

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 15

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

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 16

A metallic sphere floats in an immiscible mixture of water

(ρ_{w} = 10^{3} kg m^{- 3})

and a liquid

(ρ_{L} = 13.5 \times 10^{3} kg m^{- 3})

with

\frac{1}{5}

portion by volume in the liquid. The density of the metal is

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 17

In order that a floating object be in a stable equilibrium, its centre of buoyancy should be _____.

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 18

An ice-berg of density

900 kg m^{- 3}

is floating in water of density

1000 kg m^{- 3}

. The percentage of volume of ice-berg outside the water is

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Physics Crash Course KCET (UG)>Chapter 13 - Fluid Mechanics>Exercise 1>Q 19

A block of wood floats in water with

(4 / 5)^{th}

of its volume submerged. If the same block just floats in a liquid, the density of liquid in

(kg m^{- 3})

is