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Pressure - Coggle Diagram
Pressure
Liquid Pressure
p=ρgh where p is the pressure, h is the depth of the liquid, ρ is the density of the liquid, and g is the acceleration due to gravity.
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Liquid pressure is the increase in pressure at increasing depths in a liquid. This pressure increases because the liquid at lower depths has to support all of the water above it.
Solid Pressure
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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.
Gas Pressure
atmospheric pressure
Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth.
trapped pressure
Trapped pressure" is any pressure recorded on the drillpipe or annulus greater than the amount needed to balance the bottomhole pressure. Pressure can be trapped in the system in several ways. ... Guidelines help when releasing trapped pressure.
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Buoyancy
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This is also known as Archimedes' principle. The unit for the buoyant force (like other forces) is the Newton (N). buoyant force =(density of liquid)(gravitational acceleration)(volume of liquid) = (density)(gravitational acceleration)(height of liquid)(surface area of object) Fb = ρgV = ρghA.
Fluid Pressure
Fluid Pressure Formula: 
the pressure exerted by a fluid, directly proportional to the specific gravity at any point and to the height of the fluid above the point.
Buoyancy Formula: