In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from
Pascal' law
Stoke's law
Bernoulli's principle
Archimedes principle
If water is flowing in a pipe with speed $2 \,m / s$ then its kinetic energy per unit volume is ........... $J ^2 m ^3$
Why does a flag (or ensign) flutter when there is strong wind ? Explain.
To get the maximum flight, a ball must be thrown as
Water containing air bubbles flows without turbulence through a horizontal pipe which has a region of narrow cross-section. In this region, the bubbles
The diagram (figure) shows a venturimeter, through which water is flowing. The speed of water at $X$ is $2\,cm/s.$ The speed of water at $Y$ (taking $g = 1000 \,cm/s^2$ ) is ........ $cm/s$