Hydrostatic Pressure Formula is given by. Where, the height is h, density is ρ, gravity is g. Pressure Formula is used to compute force, density, area, pressure, height and gravity. The unit of pressure is Pascal (Pa). Solved Examples. Problem 1: A girl weighing 60 Kg wearing high heel shoes stabilises herself on a single heel The pressure is something that we apply to many objects in our daily life. For example, for opening tight jars and seal pack object we apply pressure on them to open them. In this topic, we are going to discuss pressure, pressure formula and solved examples Pressure Formula Questions: 1) The wreckage of the ship the Titanicis under 3800 m of ocean water. If the density of the cold saltwater above the Titanicis 1050 kg/m 3, what is the pressure at that depth?. Answer: The pressure can be found using the formula: P = ρg Pressure. Pressure is the force per unit area.. This means that the pressure a solid object exerts on another solid surface is its weight in newtons. divided by its area in square metres

- The formula for pressure is. P = F/A. In this equation, P stands for pressure while F stands for force and A stands for area. Pressure is typically measured in a unit called the Pascal
- Fluid pressure can be defined as the measurement of the force per unit area on a given object on the surface of a closed container or in the fluid. Gravity, acceleration, or by forces outside a closed container are the factors that cause this pressure. Fluid Pressure Formula [Image will be Uploaded Soon
- Pressure and force are related, and so you can calculate one if you know the other by using the physics equation, P = F/A. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter, or N/m2. In the foot-pound-second (FPS) system, the units are pounds per square inch, or psi. [
- Example - Pressure acting in water at depth 1 m . The density of water at 4 o C is 1000 kg/m 3.The pressure acting in water at 1 m can be calculated as. p = ρ g h = (1000 kg/m 3) (9.81 m/s 2) (1 m) = 9810 Pa Example - Pressure acting in water at depth 3 ft . The density of water at 32 o F is 1.940 slugs/ft 3.The pressure acting in water at 3 ft can be calculated as. p = ρ g

- pressure, and temperature • The ideal gas law for dry air - R d: gas constant for dry air • Equals to 287 J/kg/K - Note that P, , and T have to be in S.I. units for this equation to work using this value of R d P R d T Stull (1.12
- In mechanics, a cylinder stress is a stress distribution with rotational symmetry; that is, which remains unchanged if the stressed object is rotated about some fixed axis.. Cylinder stress patterns include: circumferential stress, or hoop stress, a normal stress in the tangential direction.; axial stress, a normal stress parallel to the axis of cylindrical symmetry
- Free online pressure conversion calculator - converting between 52 pressure units,including pascal (Pa),kilopascal (kPa),bar,psi (psi),ksi (ksi
- It is also defined as the force acting per unit area. The pressure can be of any type, such as absolute pressure, differential pressure, atmospheric pressure, and gauge pressure. The SI unit of pressure is PascalsThe formula to calculate the pressure is given by. Pressure = Force/ Area. It is also represented as. Pressure = Thrust/Are
- To calculate fluid pressure, use the formula p × g × h = fluid pressure, where p is the density of the liquid, g is the acceleration of gravity, and h is the height of the fluid. Multiply the variables and take the product of the three to solve the equation
- Fluid pressure calculator solving for change in volume given bulk modulus, initial volume and pressure
- Pipe flow and friction pressure drop, head energy loss | Darcy formula From Bernoulli equation all other practical formulas are derived, with modifications due to energy losses and gains. As in real piping system, losses of energy are existing and energy is being added to or taken from the fluid (using pumps and turbines) these must be included in the Bernoulli equation

Calculate wind pressure. The simple formula for wind pressure P in imperial units (pounds per square foot) is =, where V is the speed of the wind in miles per hour (mph). To find the pressure in SI units (Newtons per square meter), instead use =, and measure V in meters per second.. This formula is based on the American Society of Civil Engineers code. The 0.00256 coefficient is the result of. Atmospheric pressure formula is the weight of air per unit area. Its value varies with altitude. The value of atmospheric pressure at sea level is 1.013 x10 5 N/m 2 Atmospheric Pressure formula. Atmospheric pressure is measured by the following formula: Atmospheric pressure = Weight of Air /Are P is pressure, ρ represents the fluid's density and v equals its velocity. The letter g stands for the acceleration due to gravity and h is the fluid's elevation.C, the constant, lets you know that the sum of a fluid's static pressure and dynamic pressure, multiplied by the fluid's velocity squared, is constant at all points along the flow The above pressure expression is easy to see for the straight, unobstructed column, but not obvious for the cases of different geometry which are shown. Because of the ease of visualizing a column height of a known liquid, it has become common practice to state all kinds of pressures in column height units, like mmHg or cm H 2 O, etc. Pressures are often measured by manometers in terms of a.

- Pressure Drop Drawing and Equation: Pressure Drop Equation Derivation. For steady flow of an incompressible fluid in a constant diameter horizontal pipe using the Darcy-Weisbach friction loss equation, the energy equation from location 1 to 2 is expressed in terms of pressure drop as
- Systolic
**pressure**is measured by noting the value of h when blood flow first begins as cuff**pressure**is lowered. Diastolic**pressure**is measured by noting h when blood flows without interruption. The typical blood**pressure**of a young adult raises the mercury to a height of 120 mm at systolic and 80 mm at diastolic - Pressure: Pascal Atmosphere Bar Dyne/Centimeter^2 Foot of Water Inch of Mercury Inch of Water Kilonewton/Meter^2 Millibar Newton/Meter^2 Pound/Foot^2 Pound/Inch^2 Torr Area
- Pipe Pressure Drop Calculations When fluid flows through a pipe there will be a pressure drop that occurs as a result of resistance to flow. There may also be a pressure gain/loss due a change in elevation between the start and end of the pipe

Do we know the real meaning of Pressure? When does Pressure increase or decrease? What is it dependent on? Watch this video to know more. To learn more about.. Pressure on bottom of circular tank. What is the formula to calculate liquid pressure on bottom of a circular tank? The pressure is directly related to the height of fluid and is independent of tank shape, so you would use the formula above. Tank area & diameter dimension When measuring sound, we use the following logarithmic formula to determine the sound pressure level (SPL) in decibels. Here p is the sound pressure we are measuring, and Pref is our reference, the pressure of the smallest sound we can hear, 2.0×10 -5 Pa (you remembered this, right?)

** Air pressure above sea level can be calculated as**. p = 101325 (1 - 2.25577 10-5 h) 5.25588 (1) . where . 101325 = normal temperature and pressure at sea level (Pa). p = air pressure (Pa) h = altitude above sea level (m) Example - Air pressure at Elevation 10000 m. The air pressure at altitude 10000 m can be calculated as. p = 101325 (1 - 2.25577 10-5 (10000 m)) 5.2558 Pressure head formula. P = (a * r * h) can be used to obtain a relationship between the heights of columns of different liquid which would develop the same pressure at any point. Thus, if h1 and h2 are the heights of the column of liquid of specific weight w1 and w2 require to develop the same pressure p1 at any point, then from p=arh Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.: 445 Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Pressure; Common symbols. Formula Mathematically: =,. Pressure Formula. The formula for pressure is the following: Pressure (P) = Force (F) / Area (A) Pressure is also a measure of potential energy of a system. It's a force acting over an area, so if that force is performed over some distance, the system has the ability to perform work on another object or system It is the sum of the static pressure (p_0), and the dynamic pressure measured far upstream. It is called the dynamic pressure because it arises from the motion of the fluid. The dynamic pressure is not really a pressure at all: it is simply a convenient name for the quantity (half the density times the velocity squared), which represents the decrease in the pressure due to the velocity of the.

As pipe is cyllindrical so we can go for cyllindrical co-ordinates. Consider axis of pipe to be alligned in the z direction. Gravity is acting along negative y direction. And there is no flow in x direction. Suppose we apply pressure p1 at entry a.. Our Pressure Altitude then relates to this reference or our height above (or below) the pressure of 1013.25hPa. As you can see in this photo its possible to have a negative Pressure Altitude. The atmospheric pressure in our hangar today is quite high (there is more air above us pushing down) and we are located at Sea Level so our Pressure Altitude is showing as minus Pressure Vessel and Cylindrical Structura Design, Formula and Calculators Engineering Analysis Menu The following are to links to pressure vesseland Cylindrical Shapes related engineering resources, tools, articles and engineering calculators. Air Pressure at Altitude Fomula: p = p 0 e-(h/h 0) Where: p: Atmospheric pressure, in Pa p 0: Atmospheric Pressure at Sea Level, in Pa h: Height (Altitude), in meter h 0: Scale Height, in meter Note: The surface pressure on Earth is approximately 1 bar, and the scale height of the atmosphere is approximately 7 kilometers * Pressure Conversion *. Convert what quantity? From: To: Result: Information: -force is added to distinguish units of force from units of mass. The common PSI stands for pounds per square inch or pounds/square inch. BookMark Us. It may come in.

Pressure drop of gasses and vapor. Compressible fluids expands caused by pressure drops (friction) and the velocity will increase. Therefore is the pressure drop along the pipe not constant. Where: p 1 = Pressure incoming (kg/m 2) T 1 = Temperature incoming (°C Hence the pressure that is used to calculate indicated power is the mean effective pressure. IMEP is equal to brake mean effective pressure (BMEP) plus friction mean effective pressure (FMEP). The below section shows you the indicated mean effective pressure formula to calculate the IMEP (Indicated mean effective pressure) of an engine Electrostatic pressure is an electrostatic force exerted per unit area when two opposite charged particles exert a force on each other. Given here the electrostatic pressure formula to find the pressure with the known electric field value. Square the electric field value and multiply it with the electric constant value

The pressure exerted by a static fluid or hydrostatic pressure, is the pressure in an equilibrium system that depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity. Its units are the same as pressure in general, N/m 2. The formula for pressure in a fluid is given Absolute Pressure Formula Any pressure measured above the absolute zero of pressure is termed as absolute pressure. It is equal to gauge pressure plus the atmospheric pressure. It is measured using barometer. Diagram showing gauge, vacuum and abso.. Our weight is the force, but the pressure depends on how much area that weight is applied over, it may be on both feet, one foot and our two hands. Thus the pressure in a liquid is also the force exerted over some given area. In this article, we will discuss the water pressure formula with examples

What is Hydrostatic Pressure-- Fluid Pressure and Depth. The air around us at sea level presses down on us at ~14.7 pounds per square inch. We do not feel this pressure since the fluids in our body are pushing outward with the same force ** Design pressure for the piping system should be determined in accordance with ASME B 31**.3, with the following additions: 1. Where the

Convert pressure to different units; User Guide. Use this calculator to determine the pressure generated by a force acting over a surface that is in direct contact with the applied load. Two conversion scales show how pressure varies with changes in force and area whilst the other parameter is fixed to the entered value. Formula Pressure Temperature Compensation Flow Measurement Formula. Orifice meters require Pressure Temperature Compensation Formula when we use them to measure steam or gas flow in pipes with variable operating pressure and temperature. Normally we do not have an online density measurement The pressure at any point in a column of fluid caused by the weight of fluid above that point. Controlling the hydrostatic pressure of a mud column is a critical part of mud engineering. Mud weight must be monitored and adjusted to always stay within the limits imposed by the drilling situation How to calculate MAP and PP using the mean arterial pressure formula. Let's calculate the MAP of a person with a blood pressure of 120/80. Determine the SBP (systolic blood pressure). It is the first number - in this case, 120 mmHg. Find the DBP (Diastolic blood pressure). It is the second number - here equal to 80 mmHg

Pressure Drop Online-Calculator Calculation of pressure drops of flowing liquids and gases in pipes and pipe elements (laminar and turbulent flow). Note: Calculations are possible only, if Javascript is activated in your browser. Pressure Drop Online-Calculator for small mobiles. This version is usable for browsers without Javascript also Blood pressure is measured in millimeters of mercury--written as mmHg--because, historically, blood pressure calculations were made using a column of mercury displaced by pressure generated by the heartbeat and measured in millimeters. Today, digital blood pressure machines are capable of accurately calculating blood pressure automatically A pressure plate is a non-solid block that can be used to detect players, mobs, items, etc. It has four variants: Wooden pressure plate: Can detect all entities, giving out a maximum signal strength. Stone pressure plate: Can detect only players and mobs, giving out a maximum signal strength. Light weighted pressure plate: Can detect all entities. The signal strength increases as more entities. Static pressure is the pressure that a fluid exerts when it is not moving. This lesson looks at the definition of static pressure as well as how to compute the pressure

Pressure - the amount of force that is applied to an area where the force is distributed. The metric system unit used to describe pressure is the pascal (Pa) which translates to newtons per square meter. The symbol of pressure is p. Pressure formula: p = F: A: Where: F - force A - area The pressure of a system above the atmospheric pressure is called gauge pressure. It can be calculated if the absolute and atmospheric pressures are known by using the formula: P gauge = P abs - P at earth pressure coefficient for the specific case of a vertical back of wall angle and horizontal backfill surface. The Tables illustrate increasing soil-wall friction angles (δ). Table 2 - Coulomb Active Pressure Coefficient δ (deg) φ (deg) 0 5 10 15 2 Garlique Healthy Blood Pressure Formula is specially formulated with clinically supported levels of allicin, the powerful ingredient in garlic, plus a custom blend of Vitamin C, Magnesium, Vitamins B6 & B12 and Folic Acid which help support heart health and healthy blood pressure levels. Head/Pressure Conversion. Summary; Convert Head to Pressure; Convert Pressure to Head; Table of Pressure Conversions for Water; Summary. Pressure can be measured either as part of a scale (e.g. bar, pascals, psi) or in terms of the height of a fluid (e.g. metres of water)

Formula of Pressure How is Force, Area and Pressure Measured Force is Measured in Newtons Area is measured in Square Meters Since Pressure is Force/Area, It is measured in Newtons/Square Meters Note 1 Since Pressure=Force/Area If we decrease the amount of area,Pressure Increases If we increase the amount of area,Pressure Decreases. Large pressure differences are measured with heavy fluids, such as mercury (e.g. 760 mm Hg = 1 atmosphere). Small pressure differences, such as those experienced in experimental wind tunnels or venturi flowmeters, are measured by lighter fluids such as water (27.7 inch H 2 O = 1 psi; 1 cm H 2 O = 98.1 Pa) The obtained osmotic pressure with formula (2) is in psi (pounds per square inch). This calculator converts automatically the pressure to bar with the following conversion factor: 1 psi = 6.8948·10-2 bar.. If you do not have a water analysis you can use the values given in the right column in the input table Burst pressure, P, is calculated based on the following formula which uses approximate tensile strength values, T, of the polymer: To calculate the approximate burst pressure for your Zeus tubing, enter the outside diameter (OD) and inside diameter (ID) dimensions of the tubing (in inches) in the spaces below. (Note: OD must be larger than ID)

Pressure equation: P = ρgh where P = pressure (N/m 2), ρ = mass density of fluid (kg/m 3), g = acceleration due to gravity = 9.8066 m/s 2, h = height of fluid column (m) (SI units shown in equation, but calculation converts a variety of units) Introduction Engineers and others often need a conversion between pressure and height of fluid column The barometric formula is often used for estimating the air pressure under different conditions, although it gives slightly higher values compared with the real ones. Solved Problems Click or tap a problem to see the solution If your blood pressure is on point, so is your heart. Which is why you need the Optimum Blood Pressure Drops to help you improve your heart health and feel better than ever. This incredible formula works to support healthy blood pressure, blood sugar levels, cholesterol, and can even help with insulin resistance

The pressure exerted by a column of liquid is called hydrostatic pressure. This force due to the liquid's weight can be computed using the liquid's density and height. This is the reason why hydrostatic pressure has a different formula than pressure in solids Regulates the blood pressure - The product has some amazing but natural blood pressure controlling ingredients, that can manage it. Aids in Weight Loss - Blood Balance Formula is also good for a healthy weight loss process by enhancing the general metabolic rate Flow vs Pressure Calculator Use this calculator to estimate changes in flow rates when a change in fuel pressure is made. This calculator works with pressure values in either psi or kpa and flow values in either cc/min or lbs/hr Pressure Law Example: Using the example of the sealed cylinder above the pressure of gas is recorded as 1.0 x 10 5 N/m 2 at a temperature of 0°C. The cylinder is heated further till the thermometer records 150°C. What is the pressure of the gas? Solution: We know. p/T = constant. therefore, p 1 /T 1 = p 2 /T 2. p 1 = 1.0 x 10 5 N/m blood pressure, venous : 0.6-0.8: interstitial fluid (osmotic pressure) 2: acoustic pressure, eardrum ruptures (160 dB) 0.02: acoustic pressure, eardrum senses pain (120 dB) 2 × 10 −8: acoustic pressure, threshold of hearing (0 dB) 0: 0: environmental pressure −1.3: lungs, resting −1.5: lungs, drinking through a 15 cm straw −25.

Definition of pressure Formula 1-4 Boyle-Mariotte law Formula 1-5 Gay-Lussac's law Formula 1-6 General equation of state for ideal gases Formula 1-7 Equation of state for ideal gases I Formula 1-8 Equation of state for ideal gases II Formula 1-9 Most probable speed Formula 1-10 Most probable speed Formula 1-11 Mean free path Formula 1-12 Mean. The pressure, usually measured in pounds per square inch (psi), at the bottom of the hole.This pressure may be calculated in a static, fluid-filled wellbore with the equation: BHP = MW * Depth * 0.052 where BHP is the bottomhole pressure in pounds per square inch, MW is the mud weight in pounds per gallon, Depth is the true vertical depth in feet, and 0.052 is a conversion factor if these. dalton's partial pressure formula: finding total pressure: dalton's law formula and examples: how will you determine the partial pressure of n2 in the atmosphere: how to find mole fraction from partial pressure: how to find partial pressure of oxygen: formula partial pressure: how to calculate partial pressure from total pressure I used this all natural Longevity Blood Pressure Formula and it seemed as if it worked for me. I checked my blood pressure before beginning to take and it was 159/93. I took this for a few days which I had checked it daily and saw just a slight decrease after a few day I could tell it was starting to drop a few points in both systolic and diastolic pressures

You can feel an increase of pressure on your eardrums. This is due to an increase in hydrostatic pressure, the force per unit area exerted by a liquid on an object. The deeper you go under the sea, the greater the pressure of the water pushing down on you. For every 33 feet (10.06 meters) you go down, the pressure increases by one atmosphere The formula that gives the P pressure on an object submerged in a fluid is: P = r * g * h. where. r (rho) is the density of the fluid, g is the acceleration of gravity; h is the height of the fluid above the object; If the container is open to the atmosphere above, the added pressure must be included if one is to find the total pressure on an. * Design Pressure(DP) - It is function of process condition like pressure and temperature , chain reaction etc*. i.e key process parameters. Maximum allowable working pressure (MAWP) - It is the maximum process pressure that can be allowed in a pressure depending on the current metallurgical condition of the pressure vessel Pressure in Liquids. Liquids exert pressure. The pressure of a liquid acts in all directions. If we take a pressure sensor (a device that measures pressure) inside a liquid of the liquid varies with the depth of sensor. Liquid pressure formula. Consider a surface of area A in a liquid at a depth h by shaded region Suddenly I realised that 'pressure' is a term about which we study in Physics. So, I searched about the formula of 'pressure' on Google. What i found was really an eye opener for me. I found that Pressure is equal to Force upon Area. It means that Pressure is directly proportional to Force and inversely proportional to Area

- Gas Laws . Pressure or Volume. Constant Temperature; T. Original pressure x Original Volume=Final pressure x Final Volume. P 1 V 1 =P 2 V 2 Isothermic. Pressure or temperature. Constant Volume:
- Pressure_pascals = (m_kg * g_acceleration) / area_m^2. Next: p1v1=p2v2. Where: The 1s are initial pressure and volume, and the 2s are after the change in pressure and volume. If the volume changes, the pressure changes to keep it balanced. Next: Introduce the height change and volume into the pressure formula instead of area
- Pressure calculation questions including some requiring rearrangement of p=F/A. This website and its content is subject to our Terms and Conditions
- al thickness, and diameter. It is helpful in deter

Boyle's law says the volume of a mass of gas is inversely proportional to its pressure. Here is the law's formula and an example of how to use it Millibars (symbol: mb) are also commonly used when referencing atmospheric air pressure, where atmospheric pressure equals 1013.25 mbar (101.325 kPa). Meteorologists and weather reporters worldwide often use this unit for convenience, since working in pascals would result in much larger values. Psi to Bar Conversion Tabl

- Duct sizing Excel, DevExcel, dynamic
**pressure**, static**pressure**, hydraulic,**pressure**loss coefficients, singular**pressure**loss, duct K-factor, local resistance, oblong duct, equivalent diameter, surface roughness facto - Most gases closely follow an equation of state called the ideal gas law, P=(nRT)/V. It's important to pay attention to the units, however. In strict SI units (highly recommended), express n in moles, R is the universal gas constant R=8.314 J/(mol-K), T is the temperature in Kelvins, and the volume V is in m^3. The resulting pressure P will be in Pa
- Definition: pressure = force per area; p = F/A; F = force, A = area, p = pressure The SI unit of the pressure is the pascal with the formula sign Pa. 1 Pascal is equal to the pressure of 1 newton per square meter. 1 Pa = 1 N / m 2 ≡ 1 kg / m · s 2. The standard atmospheric pressure is 101,325 pascal = 1,013.25 hPa = 101.325 kP
- Figure 9-3.-Fluids exert pressure in all directions. CALCULATING PRESSURE To calculate pressure, divide the force by the area on which you apply force. Use the following formula: or To understand this idea, follow this problem. A fresh water holding tank aboard a ship is 10 feet long, 6 feet wide, and 4 feet deep. Therefore, it holds 10 x 6 x 4, or 240, cubic feet of water
- o This*pressure*distributionis*associatedwithequilibrium*since*the pressure*distributionbalances*the*weight*of*the*water*inthe*tank.*** * Units*of*PressureinSIsystem:

Solving for the pressure exerted by a factory lift given the force and area Pressure Unit Definition: Pressure - the amount of force that is applied to an area where the force is distributed. The metric system unit used to describe pressure is the pascal (Pa) which translates to newtons per square meter. The symbol of pressure is p Pressure formula Sal derives the formula to determine the pressure at a specific depth in a fluid. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked The mathematical formula for the calculation of the mean arterial pressure is: Mean arterial pressure = (cardiac output x systemic vascular resistance) + central venous pressure Note: given the small values of the central venous pressure, this can be neglected in calculating the mean arterial pressure Barlow's Formula is an equation which shows the relationship of internal pressure, allowable stress, nominal thickness and diameter. You can use Trident Steel's calculator tool to determine bursting pressure of line pipe.Trident Steel offers ERW line pipe from international and domestic mills.Use our calculator below or get a quote on line pipe today

Goff and Gratch developed an accurate formula for calculating the saturation vapor pressure (Goff and Gratch 1945), and modified this formula later ().In 1966 the World Meteorological Organization (WMO) recommended its use, and the WMO meteorological tables were based on these formulas (Letestu 1966).Wexler and Hyland obtained new laboratory data on the saturation vapor pressure of water and. Pressure formula notes . Pressure . Pressure is defined as force per unit area. Pressure can be expressed as a relative pressure or an absolute pressure. The units of pressure are: Chemical engineers are most often interested in pressures that are caused by a fluid. If fluid is flowing through a horizontal pipe and a leak develops Gas temperature will be calculated using Ramy s formula [10], Z will be calculated based on Peng- Robinson s equation and viscosity will be calculated with Guo s method [11]. 2.3. Unified formula The explicit different formula of node pressure for calculating bottom-hole pressure of production well has been deduced in section 2.2 Pressure-volume work. The meaning of work in thermodynamics, and how to calculate work done by the compression or expansion of a gas. Google Classroom Facebook Twitter. Email. Internal energy. First Law of Thermodynamics introduction. More on internal energy. Calculating internal energy and work example

Yet pressure as a whole is tied together in the end. The analogy I see is when water pressure increases, the vapor pressure elastic contracts. When water pressure decreases, the vapor pressure elastic expands. Once the elastic expands enough, the elastic breaks and snaps and water boils (intra molecular bonds are broken) I've been wondering how I can find the pressure water exerts on a sphere it's in. As for cyllinders and pyramids, and prisms - the thing is extremely easy - you just take the one formula and put in numbers. What about a situation when we have a sphere whose radius is R, and it's half full with.. The pressure head is given by the formula: Where, Z = Pressure Head. p = fluid pressure (Pressure at unit area) g= Acceleration due to gravity. Determination of Pressure Head (Z) The pressure head in fluid mechanics can be determined by considering the pressure acting at any point on a fluid in rest condition Pressure is defined as the force per unit area applied to an object in a direction perpendicular to the surface. Why doesn't pressure depend on the properties of the material exposed to the force. Vapor Pressure Formula. More Videos. When some liquid evaporates, the gaseous molecules are escaped from the air. If liquid is stored in a closed container then gaseous particles will not escape and it will be stored above the liquid atmospheric pressure formula chemistry, Chemistry for Basic science: Phases of Matter - Phase Changes; Liquid to gas; Boiling, Evaporation, Dissolving and Distillation; Structure of the Atom - Inside the Atom; Historical Timeline of the atom; The Neutron; The Electron and the Cathode Ray Tube experiment; Electron Charge and the Neutron Millikan Oil Drop Experiment; The Nucleus and.