Physical pressure refers to the force on the contact surface of two objects, or the vertical force of gas on the surface of solid and liquid, or the vertical force of liquid on the surface of solid. A formula is a formula that uses mathematical symbols to express a certain relationship (such as a law or theorem) between various quantities.
It is universal and applicable to all similar problems. In mathematical logic, a formula is a formal grammatical object to express a proposition, but the proposition may depend on the free variable value of the formula. The relationship between pressure and pressure is that pressure is all forces acting vertically on the bearing surface and pressure is the pressure per unit area.
Pressure has nothing to do with the stress area, but it is related to the stress area. Pressure is used to compare the effects of pressure. The greater the pressure, the more obvious the effect of pressure. Pressure refers to the force that occurs on the contact surface of two objects, or the vertical force of gas on the surfaces of solid and liquid.
Or the vertical force of liquid on the solid surface, and the pressure refers to the ratio of the pressure on the object to the force area. It is not pressure but pressure that measures the effect of pressure; The unit of pressure is Newton and the unit of pressure is Pascal. The pressure is expressed by f; The pressure is expressed by p.
The international unit of pressure is "Newton", abbreviated as "cow", and the symbol is "N". The unit of pressure is Pascal (abbreviated as Pa), and the symbol is PA. The pressure of liquid refers to the vertical force per unit area of liquid, which is usually expressed by P. The concept of pressure and the concept of pressure are the same and synonymous, which is called pressure in physics.
It becomes hydraulic and pneumatic pressure. The pressure of liquid refers to the vertical force on the unit area of liquid, which is usually expressed by P. In China, we usually describe the gas pressure in kilograms (not kilograms), and the unit is kgf/cm2.
A kilogram of pressure is a kilogram of force acting on a square centimeter. The commonly used unit abroad is "psi", and the specific unit is "lb/in?" , is "pound force per square inch", and this unit is like Fahrenheit scale (F).