EASY
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The gas inlet is a tubular projection below the air hole where the gas enters the Bunsen burner and mixes with the _____.

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Important Questions on Mechanical Properties of Fluids

MEDIUM
Water is flowing at a speed of 1.5 m s-1 through a horizontal tube of cross-sectional area 10-2 m2 and you are trying to stop the flow by your palm. Assuming that the water stops immediately after hitting the palm, the minimum force that you must exert should be (density of water = 103 kg m-3)
MEDIUM
A vessel completely filled with water has holes A and B at depths h and 3h from the top respectively. The hole A is a square of side L and B is a circle of radius r. The water flowing out per second from both the holes is same. Then L is equal to
EASY
An aeroplane gets its upward lift due to a phenomenon described by the
MEDIUM
Water flows in a horizontal tube (see figure). The pressure of water changes by 700 N m-2 between A and B where the area of cross section are 40 cm2 and 20 cm2, respectively. Find the rate of flow of water through the tube. (density of water =1000 kg m-3 )
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MEDIUM
Water from a tap emerges vertically downwards with an initial speed of  1.0 ms-1 . The cross - sectional area of the tap is  10-4 m2 . Assume that the pressure is constant throughout the stream of water and that the flow is streamlined. The cross - sectional area of the stream, 0.15 m below the tap would be:
(Take  g=10 ms-2 )
MEDIUM
An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are 6.4cm and 4.8cm , respectively. The ratio of the minimum and the maximum velocities of fluid in this pipe is:
HARD

A cylindrical container containing water has a small hole at height of H=8 cm from the bottom and at a depth of 2 cm from the top surface of the liquid. The maximum horizontal distance travelled by the water before it hits the ground x is

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HARD

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In the diagram shown, the difference in the two tubes of the manometer is 5 cm, the cross-section of the tube at A and B is 6 mm2 and 10 mm2 respectively. The rate at which water flows through the tube is g=10 m s-2

MEDIUM
A wind with speed 40 m s-1 blows parallel to the roof of a house. The area of the roof is 250 m2 . Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the direction of the force will be : ρair =1.2 kg m-3 
MEDIUM
A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in m s-1) through a small hole on the side wall of the cylinder near its bottom is
MEDIUM
There is a small hole near the bottom of an open tank filled with a liquid. The speed of the water ejected does not depend on
MEDIUM
A cylindrical tank has a hole of 1 cm2 in its bottom. If the water is allowed to flow into the tank from a tube above it at the rate of 70 cm3/sec. then the maximum height up to whch water can rise in the tank is
MEDIUM
A broad pipe having a radius10 cm branches into two pipes of radii 5 cm and 3 cm. If the velocity of flowing water in the pipe of radius 3 cm is 5 cm s-1, determine the velocities of water in the remaining two pipes. Given that the rate of discharge through the main branch is 600 π cm2 s-1 .
HARD
Water is flowing in a streamline motion through a tube with its axis horizontal. Consider two points A and B in the tube at the same horizontal level.
MEDIUM
A cylinder containing water up to a height of 25 cm has a hole of cross-section  1 4 cm 2  in its bottom. It is counterpoised in a balance. What is the initial change in the balancing weight when water begins to flow out

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HARD
The figure here shows a cylindrical tank with two immiscible liquids of densities d and 2d. A narrow hole is to be punched in the wall of the tank to obtain maximum range of efflux
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HARD

As shown in the figure a liquid of density ρ is standing in a sealed container to a height h. The container contains compressed air at a gauge pressure of p. The horizontal outlet pipe has a cross-sectional area A2 at E. Find the correct options. 

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MEDIUM

An incompressible liquid flows through a horizontal tube as shown in the following fig. Then the velocity v of the fluid is
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HARD
A cylinder of height h is filled with water and is kept on a block of height h2 . The level of water in the cylinder is kept constant. Four holes numbered 1, 2, 3 and 4 ate at the side of the cylinder and at height 0,h4,h2 and 3h4 respectively. When all four holes are opened together, the hole from which water will reach farthest distance on the plane PQ is the hole no.

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