Examlex
For adults,positive emotions decline with age while negative emotions increase.
Psi
Pounds per square inch, a unit of pressure measurement used to quantify the force exerted in a given area, commonly used in measuring tire and air system pressures.
Atmospheric Pressure
The pressure exerted by the weight of the atmosphere at any given point, usually measured in millibars (mb) or inches of mercury (Hg).
Sea Level
The average height of the ocean's surface between high and low tide, used as a reference point for measuring elevations and atmospheric pressure.
Fluid
A substance that has fluidity; that is, it lacks definite shape and both flows readily and yields to the slightest pressure. Most liquids and gases are fluids.
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