A nurse measures the blood pressure of a seated patient to be $190 \,mm$ of $Hg$.
The blood pressure at the patient's feet is less than $190 \,mm$ of $Hg$
The actual pressure is about $0.25$ times of atmospheric pressure
The blood pressure at the patient's neck is more than $190 \,mm$ of $Hg$
The actual pressure is about $1.25$ times of atmospheric pressure
Water is filled to a height $H$ behind a dam of width $w$. The resultant force on dam is ..............
A heavy hollow cone of radius $R$ and height $h$ is placed on a horizontal table surface, with its flat base on the table. The whole volume inside the cone is filled with water of density $\rho$ . The circular rim of the cone’s base has a watertight seal with the table’s surface and the top apex of the cone has a small hole. Neglecting atmospheric pressure find the total upward force exerted by water on the cone is
A wooden block floats in a liquid with $40\%$ of its volume inside the liquid. When the vessel containing he liquid starts rising upwards with acceleration $a = g/2$, the percentage of volume inside the liquid is ......... $\%$
Who devised for first time, a method for measuring atmospheric pressure ?
Two identical cylindrical vessels are kept on the ground and each contain the same liquid of density $d.$ The area of the base of both vessels is $S$ but the height of liquid in one vessel is $x_{1}$ and in the other, $x_{2}$. When both cylinders are connected through a pipe of negligible volume very close to the bottom, the liquid flows from one vessel to the other until it comes to equilibrium at a new height. The change in energy of the system in the process is