Explain the concept of atmospheric pressure and... - SS1 Physics Pressure And Properties of Matter Question

Atmospheric pressure is the force per unit area exerted by the Earth's atmosphere on objects within it. It is caused by the weight of the air above a particular point. A barometer is an instrument used to measure atmospheric pressure.

The most common type of barometer is the mercury barometer, which consists of a long glass tube filled with mercury and inverted into a dish of mercury. The height of the mercury column in the tube represents the atmospheric pressure. When the atmospheric pressure increases, the mercury column rises, and when it decreases, the mercury column falls. By measuring the height of the mercury column, we can determine the atmospheric pressure.