Embibe Experts Solutions for Chapter: Fluid Mechanics, Exercise 4: Exercise (Conceptual Questions)

A body measures $5 \mathrm{N}$ in air and $2 \mathrm{N}$ when put in water. The buoyant force is

The pressure of water in a water pipe when tap is opened and closed is respectively $3 \times {10}^5 \mathrm{N}/{\mathrm{m}}^2$ and $3.5 \times {10}^5 \mathrm{N}/{\mathrm{m}}^2$.With open tap the velocity of water flowing is:

The flow speeds of air on the lower and upper surfaces of the wing of an aeroplane are $v$ and $\sqrt{2}v$, respectively. The density of air is $p$ and the surface area of the wing is $A$. The dynamic lift on the wing is:

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 through a non-uniform radius tube. If the ratio of the radius of entry and exit end of the pipe is $3:2$, then the ratio of velocities of entering and exit liquid is:-

The scent sprayer is based on

Bernoulli’s equation for steady, non-viscous, incompressible flow expresses the

The velocity of water flowing in a non-uniform tube is $20 \mathrm{cm} {\mathrm{s}}^{-1}$ at a point where the tube radius is $0.2 \mathrm{cm}$. The velocity at another point, where the radius is $0.1 \mathrm{cm}$ is: