Water flows through a horizontal pipe of varying cross section at the rate of 20 lit `min^-1`. Find the, velocity of water at a point where diamete is 4 cm.

Water is flowing through a horizontal pipe in streamline flow. At the narrowest part of the pipe

Water is flowing through a horizontal tube of unequal cross section . At a point where the velocity of water is 0.4 m. s^-1 , the pressure is 0.1 m Hg. What is the pressure at a point where the velocity of water is 0.8 m. s^-1 ? The density of mercury =13.6xx10^3kg. m^-3 .

Through a horizontal tube of non-uniform cross section water is flowing a uniform rate. Pressure of water at any point in the tube is 13xx10^4 N. m^-2 and velocity of water flow is 0.6 m. s^-1 . If the velocity of water flow at another point in the tube is 9 m. s^-1 , then what is the pressure there?

Water is flowing in streamline motion through a horizontal tube. The pressure at a point in the tube is p where the velocity of flow is v. At another point, where the pressure is p/2, the velocity of flow is [density of water =rho ]

A pump lifts 200L of water per minute through a height of 5m , and ejects it through an orifice 2 cm in diameter. Find the velocity of efflux of water and the power of the pump.

When a current of 1 A flows through a copper wire of cross sectional area 1mm^2 the drift velocity of free electrons becomes v, What will be the drift velocity of free electrons when the same current flows through a copper wire of cross sectional area 2mm^2 ?

If water is poured into an inverted hollow cone whose semi-vertical angle is 30^0, show that its depth (measured along the axis) increases at the rate of 1 cm/s. Find the rate at which the volume of water increases when the depth is 24 cm.