A sniper fires a rifle bullet into a gasoline tank making a hole 53.0 m below the surface of gasoline. The tank was sealed at 3.10 atm. The stored gasoline has a density of 660 kgm-3. The velocity with which gasoline begins to shoot out of the hole is
(a) 27.8 ms-1                                            (b) 41.0 ms-1
(c)  9.6 ms-1                                             (d) 19.7 ms-1

Concept Questions :-

Bernoulli theorem
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An L-shaped tube with a small orifice is held in a water stream as shown in fig. The upper end of the tube is 10.6 cm above the surface of water. What will be the height of the jet of water coming from the orifice? Velocity of water stream is 2.45 m/s

(a) Zero                                         (b) 20.0 cm                   
(c) 10.6 cm                                    (d) 40.0 cm

Concept Questions :-

Bernoulli theorem
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Fig. represents vertical sections of four wings moving horizontally in air. In which case the force is upwards

(a)              (b) 

(c)              (d) 

Concept Questions :-

Bernoulli theorem
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A tank is filled with water up to a height H. Water is allowed to come out of a hole P in one of the walls at a depth D below the surface of water. Express the horizontal distance x in terms of H and D

(a) x=D(H-D)

(b) x=D(H-D)2

(c) x=2D(H-D)

(d) x=4D(H-D)

Concept Questions :-

Bernoulli theorem
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A rectangular vessel when full of water takes 10 minutes to be emptied through an orifice in its bottom. How much time will it take to be emptied when half filled with water
(a) 9 minute                        (b) 7 minute
(c) 5 minute                        (d) 3 minute

Concept Questions :-

Bernoulli theorem
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A streamlined body falls through air from a height h on the surface of a liquid. If d and D(D > d) represents the densities of the material of the body and liquid respectively, then the time after which the body will be instantaneously at rest, is

(a) 2hg                          (b) 2hg·Dd

(c) 2hg·dD                    (d) 2hgdD-d

Concept Questions :-

Archimedes principle
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A large tank of cross-section area A is filled with water to a height H. A small hole of area 'a' is made at the base of the tank. It takes time T1 to decrease the height of water to Hη(η>1) ; and it takes T2 time to take out the rest of water. If T1=T2, then the value of η is
(a) 2                                    (b) 3
(c) 4                                    (d) 22

Concept Questions :-

Bernoulli theorem
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 As the temperature of water increases, its viscosity

(a) Remains unchanged

(b) Decreases

(c) Increases

(d) Increases or decreases depending on the external pressure

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A small drop of water falls from rest through a large height h in air; the final velocity is

(a) h

(b) h

(c) (1/h)

(d) Almost independent of h

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The rate of flow of liquid in a tube of radius r, length l, whose ends are maintained at a pressure difference P is V=πQPr4ηl where η is coefficient of the viscosity and Q is

(a) 8                      (b) 18

(c) 16                     (d) 116

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