Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-1>Q 26

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A U-tube of small and uniform cross section contains water of total length $4 H$ . The height difference between the water columns on the left and on the right is $H$ when the valve $K$ is closed. The valve is suddenly open, and water is flowing from left to right. Ignore friction. Find the speed of water when the heights of the left and the right water columns are the same,

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Important Questions on Fluid Mechanics

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-1>Q 27

16 c m^{3}

Of water flows per sec through a capillary tube of radius

a cm

and of length

l cm

, when connected to a pressure head of

h cm

of water. If a tube of the same length and radius

2 cm

is connected to the same pressure head, the quantity of water flowing through the tube per second will be

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-1>Q 28

A tank of height

5 m

is full of water. There is a hole of cross sectional area

1 {cm}^{2}

in its bottom. The initial volume of water that will come out from this hole per second is :-

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-1>Q 29

The diagram (figure) shows a venturimeter, through which water is flowing. The speed of water at $X$ is $2 cm s^{- 1} .$ The speed of water at $Y$ (taking $g = 1000 cm s^{- 2})$ is :-

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-1>Q 30

Water contained in a tank flows through an orifice of a diameter

2 cm,

under a constant pressure difference, of

10 cm

of water column. The rate of flow of water through the orifice is:-

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-1>Q 31

The atmospheric pressure and height of barometer column is

10^{5} P_{a}

and

760 mm

respectively on the Earth surface. If the barometer is taken to the Moon then column height will be :-

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-2>Q 1

A fire hose has a diameter of

2.5 cm

and is required to direct a jet of water to a height of at least

40 m

. The minimum power of the pump needed for this hose is:

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-2>Q 2

Two identical beakers are filled with water to the same level at

4 ° C

. If one say

A

is heated while the other

B

is cooled, then:-

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Beta Question Bank for Engineering: Physics>Chapter 13 - Fluid Mechanics>Exercise-2>Q 4

A steel ball is floating in a trough of mercury. If we fill the empty part of the trough with water, what will happen to the steel ball :-