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A cubical block of copper of side 10 cm is floating in a vessel containing mercury. Water is poured into the vessel so that the copper block just gets submerged. The height of water column is ρHg=13.6 g cc-1, ρCu=7.3 g cc-1, ρwater =1gm cc-1

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Important Questions on Fluid Mechanics

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 2
A long cylindrical drum is filled with water. Two small holes are made on the side of the drum as shown in the figure. Find the depth of the liquid in the drum if the ranges of water from the holes are equal.
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 3
A block of silver of mass 4 kg hanging from a string is immersed in a liquid of relative density 0.72. If relative density of silver is 10, then tension in the string will be: [ take g=10 m s-2]
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 4
Water (density ρ) is flowing through the uniform tube of cross-sectional area A with a constant speed v as shown in the figure. The magnitude of force exerted by the water on the curved corner of the tube is (neglect viscous forces)
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 5
The centre of buoyancy of a floating object is
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 6
You are studying for an exam on the eighth floor of your luxurious apartment building. You look out from the window and notice that one of your neighbours is giving a party on the ground-floor terrace and has placed a huge punch bowl full of an interesting looking beverage(specific gravity 1) directly below your window. You quickly string together 80 drinking straws to form a giant straw that can reach the punch bowl 80 feet below. You dip the straw into the punch and begin to suck. When you use a single drinking straw to drink something, it takes you 0.1s to raise the liquid to your lips. But when you use this giant drinking straw,
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 7
An open tank 10 m long and 2 m deep is filled up to 1.5 m height of oil of specific gravity 0.82. The tank is uniformly accelerated along its length from rest to a speed of 20 m s-1 horizontally. The shortest time in which the speed may be attained without spilling any oil is : g=10 m sec-2
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 8
Following are some statements about buoyant force: (Liquid is of uniform density)
(i) Buoyant force depends upon the orientation of the concerned body inside the liquid.
(ii) Buoyant force depends upon the density of the body immersed.
(iii) Buoyant force depends on the fact whether the system is on the moon or on the earth.
(iv) Buoyant force depends upon the depth at which the body (fully immersed in the liquid) is placed inside the liquid. Of these statements:
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 10 - Fluid Mechanics>Exercise 1>Q 9
A water tank stands on the roof of a building as shown. Then the value of h for which the distance x covered by the water is maximum
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