# Ch 16: Fluid Mechanics in Physics

### About This Chapter

## Fluid Mechanics - Chapter Summary and Learning Objectives

In this chapter, you'll learn about a branch of physics that examines fluids, such as gases, liquids and plasmas, and the forces or mechanics that act upon them. The instructor will explain how mass, pressure and volume affect fluids at rest or in motion, as well as how to measure these mathematical relationships. You'll also find out how to calculate the movements of fluids.

As you progress through the videos, you can learn about the impact of gravity on fluids and become acquainted with several important equations, including one that can help you determine the speed of a flowing fluid. When you have completed this video series, you should be able to:

- Identify fluids and how they respond to specific forces, such as gravity
- Discuss, calculate and convert among units of pressure
- Explain and calculate the buoyancy of a material object partially or fully immersed in water
- Define and use an equation to determine flow rate

Video | Objective |
---|---|

Fluids | Define and discuss the characteristics of fluids. |

What Is Density? - Explanation and Examples | Identify and describe the characteristics of density and how to measure it. |

Pressure: Definition, Units and Conversions | Define pressure and convert among the units of pressure. |

Hydrostatic Pressure: Definition, Equation and Calculations | Explain hydrostatic pressure and learn how to apply the relationship between pressure, force and area for fluids. |

Buoyancy | Determine the forces on an object partly or completely immersed in a liquid. Apply Archimedes' principle to calculate buoyant forces and the densities of solids and liquids. |

Flow Rate and the Continuity Equation | Discuss and apply the equation of continuity to fluids in motion. |

Bernoulli's Equation | Explain Bernoulli's equation and apply it to fluids in motion. |

Torricelli's Theorem | Discuss and apply Torricelli's Theorem to fluids. |

### 1. Fluids in Physics: Definition and Characteristics

Fluids really know how to move! As flowing materials, fluids have some unique properties that help us understand and describe them. In this lesson you'll explore what fluids are and how they are defined in the world of physics.

### 2. What Is Density? - Explanation & Examples

After watching this video, you will be able to explain what density is, give examples of high and low density, and calculate density using an equation. A short quiz will follow.

### 3. Pressure: Definition, Units, and Conversions

Have you ever wondered what pressure is and how it gets measured? In this lesson, we are going to define pressure and explain some of the units that are used to express measurements of pressure.

### 4. Hydrostatic Pressure: Definition, Equation, and Calculations

This video lesson will introduce you to hydrostatic pressure in a liquid, as well as provide examples for how to calculate the liquid's pressure at a given depth.

### 5. Buoyancy: Calculating Force and Density with Archimedes' Principle

Knowledge of the buoyant force is important when trying to understand why some objects float while other objects sink. In this lesson you'll learn about this unique force and how we apply it to various situations using Archimedes' Principle.

### 6. Fluid Mass, Flow Rate and the Continuity Equation

Fluids rarely stay put, so we need to understand how they move. In this lesson, you will learn about how the movement of fluids is influenced by the space it passes through, as well as see examples of how to calculate aspects of this movement.

### 7. Bernoulli's Principle: Definition and Examples

Understanding how a moving fluid's speed and pressure change as it flows along is not only important for building airplanes but also for backyard fun. In this video lesson you'll learn about Bernoulli's principle and identify some practical applications of this concept.

### 8. Bernoulli's Equation: Formula, Examples & Problems

Bernoulli's equation describes an important relationship between pressure, speed, and height of an ideal fluid. In this lesson you will learn Bernoulli's equation, as well as see through an example how in an ideal fluid, the dynamics of that fluid remain constant.

### 9. Torricelli's Theorem: Tank Experiment, Formula and Examples

Torricelli's theorem has practical applications in everyday life. This physical law explains an important relationship between fluid exit velocity and the height of that fluid in a container. Here, you will learn about this relationship as well as see how to calculate exit velocity using Torricelli's theorem.

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### Other Chapters

Other chapters within the Fundamental Physics course

- Introduction to Physics
- Vectors in Physics
- Kinematics in Physics
- Newton's Laws in Physics
- Work, Energy, & Power in Physics
- Linear Momentum in Physics
- Rotational Motion in Physics
- Circular Motion and Gravitation in Physics
- Oscillations in Physics
- Electrical Forces and Fields in Physics
- Potential and Capacitance in Physics
- Direct Current Circuits in Physics
- Magnetism in Physics
- Waves, Sound, and Light
- Atomic and Nuclear Physics
- Thermal Physics & Thermodynamics
- The Universe
- Relativity & Quantum Theory in Modern Physics
- Physics Lab Experiments: Motion
- Physics Lab Experiments: Matter & Light
- Physics Lab Experiments: Electricity