Ten questions. The result tells you which lessons you may skip.
Water flows steadily through a pipe that narrows. Which statement is correct?
Two streamlines of a steady flow can never cross, because
Water flows at \(1\,\text{m/s}\) in a pipe of area \(6\,\text{cm}^2\), which narrows to \(2\,\text{cm}^2\). The speed in the narrow part is
The smooth stream of water from a tap becomes thinner as it falls because
Water flows along a level pipe, speeding up from \(1\,\text{m/s}\) to \(3\,\text{m/s}\) where the pipe narrows. The pressure in the narrow part is
In Bernoulli's equation the term \(\tfrac12\rho v^2\) is
Bernoulli's theorem, with one constant, cannot be used between
Water leaves a small hole \(5\,\text{m}\) below the surface of a wide open tank. Take \(g = 10\,\text{m/s}^2\). Its speed is
A closed tank has air above the water at a gauge pressure \(P - P_0\). Compared with an open tank, the speed of efflux from a hole at the same depth is
A tank empties through a hole in its base in a time \(T\). The level falls from the full depth to a quarter of it in
A tank on the ground holds water \(5\,\text{m}\) deep. The jet from a small hole \(1\,\text{m}\) below the surface lands at a distance of
A tank on the ground holds water \(4\,\text{m}\) deep. The greatest range of a jet from a small hole in its side is
A Pitot tube in a stream of water stands \(45\,\text{cm}\) higher than a side tube. Take \(g = 10\,\text{m/s}^2\). The speed of the stream is
A strong wind blows over the roof of a house whose windows are shut. The roof tends to