Physics
Fluid-Mechanics
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An incompressible liquid travels as shown in fig. The speed of the fluid in the lower branch will be
The correct answer is:
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Water from a tap emerges vertically downwards with an initial velocity V0. Assume pressure is constant throughout the stream of water and the flow is steady. Find the distance from the tap at which cross area of stream is half of the cross-sectional area of stream at the tap.
Water from a tap emerges vertically downwards with an initial velocity V0. Assume pressure is constant throughout the stream of water and the flow is steady. Find the distance from the tap at which cross area of stream is half of the cross-sectional area of stream at the tap.
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The tube shown in figure is of uniform cross-section. Liquid flows through it at a constant speed in the direction shown by arrows. Then the liquid exerts on the tube is:
The tube shown in figure is of uniform cross-section. Liquid flows through it at a constant speed in the direction shown by arrows. Then the liquid exerts on the tube is:
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The pressure energy per unit volume of a liquid is
The pressure energy per unit volume of a liquid is
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When a body falls in air, the resistance of air depends to a great extent on the shape of the body, 3 different shapes are given Identify the combination of air resistances which truly represents the physical situation. (The cross sectional areas are the same).
When a body falls in air, the resistance of air depends to a great extent on the shape of the body, 3 different shapes are given Identify the combination of air resistances which truly represents the physical situation. (The cross sectional areas are the same).
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The cylindrical tube of a spray pump has a cross-section of 6 cm2 one of which has 50 holes each of diameter 1mm. If the liquid flow inside the tube is 1.2 m per minute, then the speed of ejection of the liquid through the holes is
The cylindrical tube of a spray pump has a cross-section of 6 cm2 one of which has 50 holes each of diameter 1mm. If the liquid flow inside the tube is 1.2 m per minute, then the speed of ejection of the liquid through the holes is
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An ideal fluid flows through a pipe of circular cross section made of two sections with diameters 2.5 cm and 3.75 cm. The ratio of the velocities in the two pipes is
An ideal fluid flows through a pipe of circular cross section made of two sections with diameters 2.5 cm and 3.75 cm. The ratio of the velocities in the two pipes is
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Streamline flow is more likely for liquids with
Streamline flow is more likely for liquids with
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Along a stream line
Along a stream line
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Which of the following diagrams does not represent a streamline flow?
Which of the following diagrams does not represent a streamline flow?
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An aeroplane with wing area 100 m2 is travelling in a level flight at a speed of 800 km/h. Using sensors placed on the surface, above and below the plane, it has been deduced that the speed of air above is 10% higher than that of the below. Assuming density of air to be 1.5 kg m3, the mass of the plane is
An aeroplane with wing area 100 m2 is travelling in a level flight at a speed of 800 km/h. Using sensors placed on the surface, above and below the plane, it has been deduced that the speed of air above is 10% higher than that of the below. Assuming density of air to be 1.5 kg m3, the mass of the plane is
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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.
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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A cylindrical vessel is filled with water upto the height 1 m from the base. A small orifice is opened at some height in the cylinder and the water level is reduced to height of orifice in 20 sec. If the base area of the cylinder is 100 times the area of orifice, then the height of orifice from the base is (Take 
)
A cylindrical vessel is filled with water upto the height 1 m from the base. A small orifice is opened at some height in the cylinder and the water level is reduced to height of orifice in 20 sec. If the base area of the cylinder is 100 times the area of orifice, then the height of orifice from the base is (Take )
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Consider a vessel filled with a liquid upto height H. The bottom of the vessel lies in the X-Y plane passing through the or origin. The density of the liquid varies with Z-axis as
are the pressures at the bottom surface and top surface of the liquid, the magnitude of 
is:
Consider a vessel filled with a liquid upto height H. The bottom of the vessel lies in the X-Y plane passing through the or origin. The density of the liquid varies with Z-axis as
are the pressures at the bottom surface and top surface of the liquid, the magnitude of is:
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A tank of height 15 m and cross-section area 10 m2 is filled with water. There is a small hole of cross-section area ' a ' which is much smaller than the container, located at a height of 12m from the base of the container. How much force should be applied with a piston at the top level, so that the water coming out of the hole hits the ground at a distance of 16 m. (Take density of water =1000 kg / m3)
A tank of height 15 m and cross-section area 10 m2 is filled with water. There is a small hole of cross-section area ' a ' which is much smaller than the container, located at a height of 12m from the base of the container. How much force should be applied with a piston at the top level, so that the water coming out of the hole hits the ground at a distance of 16 m. (Take density of water =1000 kg / m3)
PhysicsFluid-Mechanics
Physics
Water flows through a pipe as shown in the figure. The areas of cross-section of sections A and B respectively are 4 cm2 and 1 cm2. The gauge pressure in the pipe at the centre of section A is and the flow rate is 
and the flow rate is 800 cm3 s-1 . The difference in heights of the water levels in the vertical pipes is m. (Acceleration due to gravity =10 ms-2)
Water flows through a pipe as shown in the figure. The areas of cross-section of sections A and B respectively are 4 cm2 and 1 cm2. The gauge pressure in the pipe at the centre of section A is and the flow rate is and the flow rate is 800 cm3 s-1 . The difference in heights of the water levels in the vertical pipes is m. (Acceleration due to gravity =10 ms-2)
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