Question

What is atmospheric pressure and how is it determined using Barometer?

Answer 1

It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer it is determined because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude

Answer 2

HLO MATE HERE IS UR ANSWER.

⭐. The pressure of atmosphere at any point is equal to the weight of air column of unit cross -sectional area extending from that point to the top of the atmosphere.

❤. BAROMETER ❤

⭐. Mercury barometer consists of a long glass tube closed at one end and filled with mercury.

⭐. It is inverted into a trough of mercury.

⭐. The space above the mercury column in the tube contains only mercury vapour whose pressure (p) may be neglected .

⭐. point A and B are at same level.

Hence pressure at A = pressure at B.

pa = h (mu)g

where. mu = density of mercury.

h = height of the mercury column in the tube.

pa = atmospheric pressure