Formulas of pressure in liquids, gases and solids.

| December 8, 2020 | education

Solids:
P = F / S (body pressure on the support), measured in pascal [Pa = N / m]
ρ = m / V (body density)

For liquids:
Liquid hydrostatic pressure formula:
P = ρgh
(h is the height of the liquid column, for example, the height of a glass completely filled with water)

For liquids and gases, the same pressure formula is suitable (except for one, it is lower), but you can give formulas from private cases if the liquid presses on the glass:

The weight of the water acts on the bottom, therefore:
P = mg (where P is weight)

The pressure for gases can be obtained through the laws of thermodynamics. It starts in the 10th grade, so if you use it in the classes below (the only question is where), then they may look at you as a patient, I warn you.

All these formulas for gases, as well as almost all formulas in thermodynamics. you need to know:
PV = νRT (Periodic-Cliperon Equation)
P = nkT = N / V * kT (Ideal gas equation of state)
PV = m / M * RT (replacement of the amount of substance)
PV / T = const (for m = const)
PV = const (T = const, Boyle-Mariotte zone)
V / T = const (P = const, Gay-Lusaka)
P / T = const (V = const, Charles)



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.