Define standard atmospheric pressure.

Answer the following questions in detail:

a. Define atmospheric pressure. Prove the presence of atmospheric pressure with the help of an activity.
b. Derive that [tex]\( P = \rho gh \)[/tex].
c. Describe the structure and working method of a mercury barometer briefly.

1. Enlist any three points to show the importance of atmospheric pressure.
2. Mention four applications of liquid pressure.
3. Mention any three events in our daily life that are directly related to pressure. Give reasons:
- The level of mercury falls in a barometer when taken to a mountain.
- Dams are made wider at the bottom than at the top.

Additional questions:
f. Which property of liquid is applicable in water supply systems in cities?
g. Which property of liquid supports its use in hydraulic machines?

Standard atmospheric pressure is the pressure exerted by the atmosphere at sea level, demonstrated by the height of a mercury column in a barometer. Hydrostatic pressure is crucial for water supply systems in cities, while the incompressibility of liquids supports their use in hydraulic machines.

Explanation:

Standard atmospheric pressure is the pressure exerted by the atmosphere at sea level, which is equivalent to 101,325 Pascals (Pa). An example of this is the height of a column of mercury in a barometer, which is about 760 mm (29.92 in.) at sea level due to atmospheric pressure.

In a water supply system in cities, the property of liquids that is applicable is hydrostatic pressure. This property allows water to be pushed through pipes and reach different parts of the city at the same pressure level.

The property of liquids that supports their use in hydraulic machines is the fact that liquids are virtually incompressible. This property enables hydraulic machines to transmit force through the liquid without losing pressure.

Learn more about Properties of Liquids and Atmospheric Pressure here:

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