Mechanical Prop...

Water is maintained at a height of 10m in a tank.The diameter of a circular aperture needed at the base of the tank to discharge water at the rate of 26.4m$$^{3}$$ min$$^{-1}$$ is(Given that g $$=$$ 9.8 m s$$^{-2})$$:

An aeroplane of mass $$6000 \ kg$$ is flying at an altitude of $$3 \ km$$. If the area of the wings is $$30 \ m^{2}$$ and the pressure at the lower surface of wings is $$0.6\times10^{5}\ pa$$, the pressure on the upper surface of wings is : ( in pascal) ( $$g= 10 \ ms^{-2}$$)

At what speed will the velocity head of stream of water be equal to 40cm?

The pressure that will be built up by a compressor in a paint-gun when a stream of liquid paint flows out with a velocity of $$25 ms^{-1}$$ ( density of paint is $$0.8 gm -cm^{-3}$$) is : ( in $$Nm^{-2}$$)

A plane is in a level flight at a constant speed and each of its two wings has an area of $$25 \ m^{2}$$. If the speed of air is $$180 \ km h^{-1}$$ over the lower wing and $$234 \ km h^{-1}$$ over the upper wing surface, the plane's mass is : (Take density of air $$=1 kg m^{-3}$$.)

A tank containing water has an orifice on one vertical wall. If the centre of the orifice is 4.9 m below the surface of water in the tank, the velocity of discharge is :

The level of water in a tank is 5m high. A hole of area of cross section 1 cm$$^{2}$$ is made at the bottom of the tank. The rate of leakage of water from the hole in $$m^{3}s^{-1}$$ is ( g $$=$$ 10ms$$^{-2}$$):

A cylindrical vessel contains a liquid of density $$\rho $$ upto a height $$h$$. The liquid is closed by a piston of mass $$m$$ and area of cross section $$A$$.There is a small hole at the bottom of the vessel.The speed with which the liquid comes out of the vessel is:

Two hail stones with radii in the ratio of $$1:2$$ fall from a great height through the atmosphere. Then their terminal velocities are in the ratio of:

In a horizontal oil pipe line of constant cross sectional area the decrease of pressure between two points 100 km apart is 1500 pa. The loss of energy per unit volume per unit distance is ----Joule.