Question

Based on the figure above, identify the correct statement(s) from the following

• A. At sealevel, the mercury inside the tube stands upto $76cm$
• B. The pressure exerted inside a liquid is same at all points along the horizontal plane
• C. The vertical height of the liquid column is independent of the shape and size of the tube
• D. The height of barometric liquid column is independent of nature of liquid used

Answer 1

Answer: (A), (B), (C)

At sealevel, the mercury inside the tube stands upto $76cm$
The vertical height of the liquid column is independent of the shape and size of the tube
The pressure exerted inside a liquid is same at all points along the horizontal plane

Atmospheric pressure at mean sea level is defined as 76 cm of mercury column.

Since the outside pressure is 1 atm, this pressure is only exerted inside the liquid at all points along a horizontal plane.

Vertical height for pressure is given by $P=\rho gh$, which is independent of shape and size.

Pressure is dependent on density.

Height will vary with different fluids.

$H=\frac{P}{\rho g}$