What is the formula used to calculate pressure?

What is the formula used to calculate pressure?

Pressure is the force per unit perpendicular area over which the force is applied, p=F/A.

How do you calculate pressure in a pipe?

Barlow's Formula relates the internal pressure that a pipe can withstand to its dimensions and the strength of its materials. The formula is P= (2*T*S/D), where: P = pressure. S = allowable stress.

How do you calculate the entropy of an ideal gas?

It is known [1] that the entropy change for a monatomic ideal gas is given by DS = nRln(Tf /Ti)-nRln(Pf/Pi), where R is the molar gas constant and n is the amount of substance. This formula, which was obtained by recurring to a reversible process between the states (Ti ,Pi) and (Tf,Pf), gives DS = -8.000 J K-1.

How do you calculate entropy of air?

0:095:14How To Calculate Entropy Changes: Ideal Gases - YouTubeYouTubeInício do clipe sugeridoFinal do clipe sugeridoAnd that definition is that the change in entropy between two states is equal to the integral of theMoreAnd that definition is that the change in entropy between two states is equal to the integral of the reversible heat transfer divided by the absolute temperature.

What is area formula?

Given a rectangle with length l and width w, the formula for the area is: A = lw (rectangle). That is, the area of the rectangle is the length multiplied by the width. As a special case, as l = w in the case of a square, the area of a square with side length s is given by the formula: A = s2 (square).

What is the formula for work done?

Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as W = f .

Does pipe size affect pressure?

The more water that is being forced through a pipe, the more pressure there will naturally be. Through any pipe size, higher water pressure will cause greater water flow. The pressure will decrease downstream, however, because of loss of friction and water velocity increase.

Does reducing pipe size increase water pressure?

Squeezing the water into a smaller pipe will not increase the water pressure! ... As water moves through a hose or pipe there is a lot of resistance caused by the hose or pipe surfaces. The water moves through the hose at the maximum speed it can while still overcoming this friction.

What is CP and CV?

Main Difference – CV vs CP CV and CP are two terms used in thermodynamics. CV is the specific heat at constant volume, and CP is the specific heat at constant pressure. Specific heat is the heat energy required to raise the temperature of a substance (per unit mass) by one degree Celsius.

What is the formula for calculating entropy?

Key Takeaways: Calculating Entropy

1. Entropy is a measure of probability and the molecular disorder of a macroscopic system.
2. If each configuration is equally probable, then the entropy is the natural logarithm of the number of configurations, multiplied by Boltzmann's constant: S = kB ln W.

What is the correct equation for pressure?

• The equation for pressure is P = F/A. Pressure can be measured for a solid is pushing on a solid, but the case of a solid pushing on a liquid or gas requires that the fluid be confined in a container. The force can also be created by the weight of an object.

What is the formula to calculate pressure?

• In physics, pressure is defined as the force over a given area. Given the same force, the smaller the area of contact, the more pressure is applied. The formula used to describe and calculate pressure is: Pressure = Force ÷ Area.

What's the formula for pressure?

• Pressure Formula. Pressure is a force per unit area that acts on an object. It can be expressed simply as P = F/A, where F is a force, and A is the area it acts on.

How to calculate Force based on pressure?

• How to Calculate Force Based on Pressure. 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/m 2.