List of top Physics Questions on Fluid Mechanics asked in AP EAPCET

A liquid flows with velocity $2$ m/s through a pipe of diameter $0.01$ m. Density = $1000$ kg/m$^3$, viscosity = $0.5$ kg/m$\cdot$s. Reynolds number is:
A thin metal disc of radius \(r\) floats on water surface and bends the surface downwards along the perimeter making an angle \(\theta\) with vertical edge of the disc. If the disc displaces a weight of water \(W\) and surface tension of water is \(T\), then the weight of metal disc is
A circular film of a liquid has an area of \(10\ \text{cm}^2\). If the work done in making its radius two times the initial radius is \(8\times10^{-3}\ \text{J}\), the surface tension of the liquid is \[ \left(1+\frac{1}{\alpha}\right)\ \text{N m}^{-1}. \] The value of \(\alpha\) is
A large tank open to atmosphere at top and filled with water, develops a small hole in the side at a point \(20 \, \text{m}\) below the water level. If the rate of flow of water from the hole is \(3\times 10^{-3}\,\text{m}^3/\text{min}\), then the area of hole is \((g=10\,\text{m s}^{-2})\):
The movable cylindrical pistons \(P_1\) and \(P_2\) of a hydraulic lift are of radii \(2\ \text{m}\) and \(R\) respectively. A body of mass \(32\ \text{kg}\) on piston \(P_2\) is supported by a body of mass \(2\ \text{kg}\) placed on piston \(P_1\). The value of \(R\) is
A hydraulic lift is shown in the figure. The movable pistons \(A\), \(B\) and \(C\) are of radius \(10\,\text{cm}\), \(100\,\text{cm}\) and \(5\,\text{m}\) respectively. If a body of mass \(2\,\text{kg}\) is placed on piston \(A\), the maximum masses that can be lifted by piston \(B\) and \(C\) are respectively
A liquid is flowing through a tube of diameter 9 mm with a speed of \(10\,cm\,s^{-1}\). If this tube is connected to a narrow tube in which the liquid flows with a speed of \(90\,cm\,s^{-1}\), then the diameter of the narrow tube is: