When a fluid passes through a constricted part of a pipe, what happens to its velocity and pressure ?
When a fluid passes through a constricted part then according to $v \propto \frac{1}{\mathrm{~A}}$ its velocity increases and according to Bernoulli's equation $\mathrm{P}_{1}+\frac{1}{2} \rho v_{1}^{2}=\mathrm{P}_{2}+\frac{1}{2} \rho v_{2}^{2}$ pressure decreases.
Does it matter if one uses gauge instead of absolute pressures in applying Bernoulli’s equation? Explain.
A plane is in level flight at constant speed and each of its two wings has an area of $25 \;m ^{2}$ If the speed of the air is $180 \;km / h$ over the lower wing and $234\; km / h$ over the upper wing surface, determine the plane's mass in $kg$. (Take air density to be $1\; kg m ^{-3}$ ).
An $ L-$ shaped tube with a small orifice is held in a water stream as shown in fig. The upper end of the tube is $ 10.6 cm$ above the surface of water. ....... $cm$ will be the height of the jet of water coming from the orifice ? Velocity of water stream is $2.45 m/s$
A liquid flows through a horizontal tube. The velocities of the liquid in the two sections which have areas of cross-section $A_1$ and $A_2$ are $v_1$ and $v_2$ respectively. The difference in the levels of the liquid in the two vertical tubes is $h$ . The incorrect statement is
To get the maximum flight, a ball must be thrown as