Chapter 15 Fluid Mechanics. Density Example Find the density of an 4g mass with a volume of 2cm 3.

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Presentation transcript:

Chapter 15 Fluid Mechanics

Density

Example Find the density of an 4g mass with a volume of 2cm 3.

Pressure For force uniform over the surface:

More on the Units of Pressure 1

More on the Units of Pressure 2

Convert atm to mmHg

Pressure from Weight The deeper you go, the more fluid you have above your head, the heavier it is, the higher the pressure on you.

Static Fluid The pressure in the static case depends ONLY on the depth. The shape of the container does not matter. Pascal’s Law: Pressure is transmitted undiminished to everywhere in the fluid.

Hydraulic Lift

Buoyancy: Archimedes’ Principle A fluid exerts an upward force on the body equal to the weight of the fluid displaced.

Archimedes’ Principle

Dead Sea (very salty!)

Archimedes’ Principle: Explanation

Weight of Gold in Water The gold statue weighs 147N. Find the buoyant force and the weight of the statue in water.

Finding Density

Finding Density (Alternative Method)

Incompressible Fluid Flow

Bernoulli’s Equation Usually used this way:

A Leaky Tank

Applications

Bunsen Burner

Air Multiplier & Eductor

Curve Ball

Viscosity

Turbulence vs Laminar Flow

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