1. A venturi meter is used to measure the water flow in a pipe with the diameter of 85mm. The difference between the neck and the inlet was measured with u-tube containing mercury. Calculate the diameter of its neck so that the difference of mercury level reaches 300mm when the quantity of water flowing in the pipe is 0.012 m3/s. Assume that the discharge coefficient is 0.9.

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Fluid Materials

In general terms, anything that flows can be termed as a fluid. In other words, a fluid is any substance that cannot resist shear forces and deforms continuously under the application of external shear forces. Fluid materials differ completely from solid materials such as metals and alloys. For instance, if we consider two infinitesimally small cross-sectional areas of fluid materials and solid materials, and apply shear forces to these elements, both the elements will undergo deformation. Upon releasing the shear force, the element of the solid materials will regain its original orientation, but the element of the fluid materials will keep on deforming continuously under the action of the shear force.