The force acting perpendicularly to the surface of an object is called pressure

Perpendicular to the force-bearing surface and directed toward the force-bearing object

on the surface of a force-bearing object

The ratio of the pressure on an object to the area on which it is subjected is called pressure

P=F/s

Pascal, abbreviation: Bo, symbol: Pa

P=F/s

When the stress area is constant, increase (or decrease) the pressure; when the pressure is constant, decrease (or increase) the stress area

Liquid is produced by gravity

The pressure inside a liquid increases with depth

At the same depth, the pressure of a liquid is equal in all directions

At the same depth of different liquids, the greater the density of the liquid, the greater the pressure

produced due to the effect of gravity on the atmosphere

Atmospheric pressure decreases as altitude increases, and atmospheric pressure is also related to weather

Standard atmospheric pressure is equivalent to the pressure generated by a 760mm high mercury column, which is approximately 100000Pa.

Barometer

As the air pressure increases, the boiling point increases; as the air pressure decreases, the boiling point decreases

When F float > G object (or ρ liquid > ρ object), the object floats

When F float = G object (or ρ liquid = ρ object), the object is suspended

When F floating < G object (or ρ liquid < ρ object), the object sinks

Change the density of a liquid

Change the volume of liquid displaced by an object

Change the gravity of an object

Weighing method:

Principle method:

Two force balance method:

Pressure difference method: