$A$ scent sprayer is based on

$A$ horizontal pipe of non-uniform cross-section allows water to flow through it with a velocity $1 \ m/s$ when the pressure is $50 \ kPa$ at a point. If the velocity of flow has to be $2 \ m/s$ at some other point,the pressure at that point should be: (in $kPa$)

The weight of an aeroplane flying in the air is balanced by:

At a hydroelectric power plant,the water pressure head is at a height of $300\; m$ and the water flow available is $100\; m^{3} s^{-1}.$ If the turbine generator efficiency is $60\%,$ estimate the electric power available from the plant (in $MW$) $\left(g=9.8\; m s^{-2}\right).$

An ideal liquid flows through a horizontal tube of variable diameter. The pressure is lowest where the . . . . . . .

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