A rectangular box containing water is accelerated upwards at 3m/s2 on an inclined plane making 30Ëš to the horizontal. The slope of the free liquid surface is :


Correct option is







Water from a tap emerge vertically downward with a initial speed of 1 m/s. The cross section area of the tap is 10–4 m2. Assume that the pressure is constant throughout the stream of water and that the flow steady. The cross section area of the stream 0.15 m below the tap is : 


A pipe GB is fitted with two pipes C and D. The pipe has area A = 24 m2at G and velocity of water at G is 10 m/s and at C is 10 m/s the velocity of water D is 


A non viscous liquid of constant density 500 kg/m2 flows in a variable cross-sectional tube. The area of cross section of the tube at two points Pand Q at height of 3 m and 6 m are  and  respectively. The work done per unit volume by the force of gravity as the fluid flows from point P and Q is   


Water flows along a horizontal pipe whose cross section is not constant. The pressure is 1 cm of Hg where the velocity is 35 cm/s. At a point where the velocity is 65 cm/s. At a point where the velocity is 65 cm/s, the pressure will be:


A cylindrical vessel is filled with water to a height H. A vessel has two holes in the side, from which water is rushing out horizontally and two streams strike at the same point. If the lower hole Q is h height abve the ground, then the height of hole P above the ground will be :


There is a wide tank of cross-section area A contain a liquid to a height Hhas a small orifice at its base of area 'a' (a < < A). The time during which liquid level falls to a height 


Water stands at a depth of 15m behind a reservoir dam. A horizontal pipe 4 cm in diameter passes through the dam 6m below the surface of water as shown. There is plug which secures the pipe opening. Then the friction between the plug and pipe wall is:


An isosceles triangle of base 3m and altitude 6m, is immersed vertically in water having its axis of symmetry horizontal as shown in figure. If height of water on its axis is 9m, the total thrust on the plate is


A liquid of density ðœŒis compin a rectangular box. The bletely filled ox is accelerating horizontally with acceleration 'a'. What should be the gauge pressure at four points P, Q, R, S ?


The speed of liquid through the siphon is: