## Introduction

The term pressure which is the force applied by one object on another. The pressure which is articulated as force per unit area that are articulated as

\[P=\frac{F}{A}\]

Where we can see that

Letter F = Force which is applied by the body is denoted by letter N

A = Total area which is of the object m^{2}

## Partial Pressure Formula

The molecule and then the atoms which are in a solid are in close proximity to each other and there is a significant force which is between these molecules. Solids will take a form which is said to be determined by the nature of these forces which is between the molecules. Even a large force which is said to be produces only small displacements in the molecules or the atoms of the lattice and the solid maintains and its shape.

The solids are said to also resist shearing forces. The shearing forces are forces which are applied tangentially to a surface as described in Static Equilibrium and Elasticity.

### Osmotic Pressure Formula

The gasses and the Liquids are said to be considered to be fluid because they yield to shearing forces which is whereas solids resist them. Like we can say that the solids and the molecules which are in a liquid are bonded to neighboring molecules but we can say that they possess many fewer of these bonds. The molecules which are in a liquid are not locked which is in place and can move with respect to each other. The distance which is between molecules is said to be similar to the distances which are in a solid and so the liquids have definite volumes. but we need to notice that the shape of a liquid changes which is depending on the shape of its container. The gases are said to be not bonded to neighboring atoms and they can have large separations which are said to be between molecules. The gases which generally have neither specific shapes nor definite volumes as well since we can say that their molecules which generally move to fill the container in which they are held.

The liquids which generally deform easily which is when they are stressed and do not spring back which is to their original shape once a force is removed. This generally occurs because the molecules and the atoms which are in a liquid are free to slide about and change neighbors. we can say that the liquids flow so they are a type of fluid which is with the molecules held together by mutual attraction. We see here that when a liquid is placed in a container with no lid it remains in the container. Because we can say that the atoms are closely packed, the liquids like solids resist compression which is an extremely large force said to be necessary to change the volume of a liquid.

In contrast we can say that the atoms which are in gases are said to be separated by large distances and the forces which are between atoms in a gas are therefore very weak that generally except when the atoms collide with one another. This makes gases which is said to be relatively easy to compress and allows them to flow which makes them fluids. We can say that when placed in an open container that is the gases and unlike liquids, will escape.

### Absolute Pressure Formula

Pressure that is said to be the symbol: p or P is the force that is applied perpendicular to the surface that is of an object per unit area which is said to be over which that force is distributed. The pressure Gauge that also spelled gage pressure is said to be the pressure which is said to be relative to the ambient pressure.

We can see the various units that are used to express pressure. There are some of these derived from a unit of force which is said to be divided by a unit of area that is the SI unit of pressure that is the pascal denoted by Pa for example we can say that this is one newton per square metre that is N/m2 . Similarly we can say that the pound-force which is said to be per square inch that is psi is the traditional unit of pressure which is in the imperial and U.S. that is said to be customary systems. We can say that the pressure which generally may also be expressed in terms of standard atmospheric pressure that is the atmosphere denoted by atm is equal to this pressure. and we can say that the torr is defined as 1/760 of this. The unit of the Manometric such as the centimetre of water which is said to be millimetre of mercury and inch of mercury are used to express pressures that is in terms of the height of column which is of a particular fluid in a manometer.

The SI unit that is said to be for pressure is the pascal denoted by Pa, this is said to be equal to one newton per square metre that is N/m2, or kg·m−1·s−2. This is said to be the name for the unit was added in 1971 that is said to be before that pressure in SI was expressed simply which is in newtons per square metre.

Other units which are of the term that is pressure which is said to be such as pounds per square inch that is Lbf/in2 and bar that are also in common use. The CGS unit which we have already seen or leant in previous articles of pressure is the barye that is Ba, equal to 1 dyn·cm−2 or we can say it 0.1 Pa. the Pressure which is sometimes said to be expressed in grams-force or kilograms which is force per square centimetre that is said to be g/cm2 or kg/cm2 and the like which is without properly identifying by the unit forces. But we can say that using the names that are said to be kilogram or gram or the kilogram-force or gram-force or their symbols that is as units of force which is expressly forbidden in SI. The technical atmosphere which is said to be the symbol: at is 1 kgf/cm2 that is said to be 98.0665 kPa, or 14.223 psi.

1. Explain What is the SI Unit of Pressure?

Ans: We can say that the SI unit which is for pressure that is the pascal denoted by Pa. that is said to be equal to one newton per square metre which is written as N/m^{2}, or kg·m^{-1}·s^{-2}. We can say that the Pascal is said to be a so-called coherent derived unit in the SI with a special name and symbol as well.

2. Explain What is the Largest Unit of Pressure?

Ans: atm

The Problem which asks for the ranking that is from the unit which is smallest to the largest scale. We can say that this is said to be the largest unit which will appear to have the smallest magnitude which is when compared to a reference which is similar. In this case we can say that the atm will appear to be the largest unit while the letter that is Pa is the smallest.

3. Explain How Force is Related to Pressure?

Ans: We can here note that when a force is generally exerted on an object it can change the object's speed and then the direction of movement or shape. The term which is pressure is said to be a measure of how much force is said to be acting upon an area. The term which is said to be pressure that generally can be found using the equation pressure = that is said to be force / area. Therefore we can say that a force which is said to be acting over a smaller area will create more pressure.

4. Explain that it is the ATM SI Unit of Pressure?

Ans: We can say that the unit which is of pressure is said to be the SI system is the pascal which is denoted by a letter that is Pa. we can say that it is said to be defined as a force which is of one Newton that is per square meter. The conversion which is said to be between atm and Pa and torr is as follows: that is 1 atm = 101325 Pa = 760 torr.