Question
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} m^{2}. 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 :

None of these



easy
Solution
According to continuity equation
SIMILAR QUESTIONS
A liquid is kept in a cylindrical vessel which is being rotated about its axis. The liquid rises at the sides. If the radius of the vessel is 0.05 m and the speed of rotation is 2 rev/s, find the difference in the heights of liquid at the centre of the vessel and at its sides.
The pressure difference between two points along a horizontal pipe, through which water is flowing, is 1.4 cm of mercury. If, due to nonuniform crosssection, the speed of flow of water at the point of greater crosssection is 60 cm/s, calculate the speed at the other point. Density of mercury .
Water flows into a horizontal pipe whose one end is closed with a valve and the reading of a pressure gauge attached to the pipe is . This reading of the pressure gauge falls to when the valve is opened. Calculate the speed of water flowing into the pipe.
Air is streaming past a horizontal aeroplane wing such that its speed is 120 ms^{–1} at the upper surface and 90 ms^{–1} at the lower surface. If the density of air is 1.3 kg/m^{3}, find the difference in pressures between the two surfaces of the wing. If the wing is 10 m long and has an average width of 2 m, then calculate the gross lift on it.
A horizontal tube has different crosssectional areas at points A and B. The diameter of A is 4 cm and that of B is 2 cm. Two manometer limbs are attached at A and B. When a liquid of density 0.8 g/cm^{3} flows through the tube, the pressuredifference between the limbs of the manometer is 8 cm. calculate the rate of flow of the liquid in the tube. (g = 980 cm/s^{2})
Find out the velocity of efflux of water from a hole in the wall of a tank made at 20 m below the free surface of water in the tank.
g = 10 m/s^{2}.
Water tank has a hole in its wall at a distance of 10 m below the free surface of water. The diameter of the hole is 2 mm. Compute the velocity of efflux of water from the hole and the rate of flow of water. (g = 9.8 m/s^{2})
S_{1} and S_{2} are spring balances. A block A is hanging from spring balanceS_{1} and immersed in a liquid L which is contented a beaker B. The mass of beaker B is 1 kg and the mass of liquid L is 1.5 kg. The S_{1} and S_{2}balances reads 2.5 kg and 7.5 kg respectively. What will be the reading ofS_{1} and S_{2} when the block A is pulled up out of the liquid :
Air is blow through a pipe AB at a rate of 15 liter per minute. The cross section area of the wide portion of the pipe AB is 2 cm^{2} and that of the narrow potion is 0.5 cm? the difference in the water level h is :
A pipe GB is fitted with two pipes C and D. The pipe has area A = 24 m^{2}at G and velocity of water at G is 10 m/s and at C is 10 m/s the velocity of water D is