Embibe Experts Solutions for Chapter: Mechanical Properties of Fluids, Exercise 1: Exercise

For flow of a fluid to be turbulent,

A liquid flows through a pipe of varying diameter. If $A_1$ and $A_2$ are the cross-sections of the pipe at two points, the ratio of velocities of liquid flow at these points will be:

An incompressible fluid flows steadily through a cylindrical pipe which has radius $2R$ at point $A$ and radius $R$ at point $B$, further along the flow direction. If the velocity at point $A$ is $v$, its velocity at point $B$ will be:

Water is flowing in a horizontal pipe of non-uniform cross-section. At the most contracted place of the pipe:

A horizontal pipeline carrying gasoline has a cross-sectional diameter of $5 \mathrm{mm}$. If the viscosity and density of the gasoline are $6\times {10}^{-3}$ poise and $720 \mathrm{kg} {\mathrm{m}}^3$ respectively, the velocity after which the flow becomes turbulent is

In a horizontal pipe of non-uniform cross-section, water flows with a velocity of 1 ms⁻¹ at a point where the diameter of the pipe is 20cm. The velocity of water in (ms⁻¹) at a point where the diameter of the pipe is 5cm is:

Physical processes are sometimes described visually by lines. Only the following can cross 

In airfoil, the streamlines are crowded above the wings of aeroplane more than those below it. This causes (during take off)