24 lines
752 B
Markdown
24 lines
752 B
Markdown
Hydrostatic equilibrium and fluid motion.
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Fluids include gasses and liquids.
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- For a gas, the density changes readily, and the molecules are far apart.
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- For liquids, molecules are close together, and the density remains basically constant
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A fluid is defined as a matter that flows under the influence of external forces.
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Fluids cannot maintain a fixed structure, but fit the shape of the container they're confined to.
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# Pressure
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Pressure is defined as **force *per* unit area*** exerted by a fluid.
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$$ p = \frac{F (N)}{A(m^2)} $$
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The SI unit for pressure is called a pascal ($Pa$), equal to $\frac{N}{m^2}$.
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Pressure is exerted on the fluid's container.
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Pressure is the same everywhere at the same depth.
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$$ 1atm = 101.3 kPa = 14.7 psi $$
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