AP Physics Study Packages AP Physics Fluids | Page 24

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Online Multiple Choice Quiz

Rapid Review (From the 5-Steps Book)

Pressure equals force divided by the area over which the force is applied.

Density equals the mass of a substance divided by its volume. The ratio of a substance's density to the density of water is called the substance's "specific gravity."

The absolute pressure exerted by a column of a fluid equals the pressure at the top of the column plus the gauge pressure—which equals ρgh.

The buoyant force on an object is equal to the weight of the fluid displaced by that object.

If a force is applied somewhere on a container holding a fluid, the pressure increases everywhere in the fluid, not just where the force is applied.

The volume flow rate—the volume of fluid flowing past a point per second—is the same everywhere in an isolated fluid stream. This means that when the diameter of a pipe decreases, the velocity of the fluid stream increases, and vice versa.

Bernoulli's equation is a statement of conservation of energy. Among other things, it tells us that when the velocity of a fluid stream increases, the pressure decreases.