About This Chapter
Energy & Thermodynamics - Chapter Summary
Complete this chapter on energy and thermodynamics as a refresher for the New York State Physics Regents Exam. Our series of brief video lessons, developed by a team of professional educators, covers mathematics of work, as well as the work-energy theorem. You'll learn about work done by a variable force and explore conservation of mechanical energy. Other topics covered in this chapter include the following:
- What is energy? Definition and significance in nature
- Kinetic energy to potential energy: Relationship in different energy types
- First law of thermodynamics: Law of conservation of energy
- Second law of thermodynamics: Entropy and systems
- Early atomic theories of Dalton, Thomson, Rutherford and Millikan
- What is mechanical energy? Definition and examples
Our videos use everyday language and real-world examples to make learning about energy and thermodynamics easy and fun. Though brief - most can be watched in just 5-10 minutes - these video presentations are comprehensive and can serve as excellent preparation for the Regents Physics Exam. Each lesson also includes a short, multiple-choice quiz, which can help you gauge your knowledge of energy and thermodynamics.
Physics Regents Exam Objectives
The 85 multiple-choice and written-response questions on the New York State Regents Physics Exam are divided among three sections. This is one of four science exams that you can choose from in testing for your Regents Diploma. You'll also need to pass exams in global and U.S. history, comprehensive English and math to earn your diploma, which is required to graduate from a New York State high school.
1. Work: Definition, Characteristics, and Examples
Pushing a wall all day may feel like work, but unless you get that wall moving you're not doing any work according to the rules of physics. In this video lesson, you'll learn how work is defined as well as how to calculate the amount of work done on an object.
2. Work Done by a Variable Force
Doing work on an object is a simple concept: we apply a certain force over a certain distance. But in real life, that force is rarely constant. Therefore, we need to understand variable forces and be able to calculate them accurately.
3. What is Energy? - Definition and Significance in Nature
This lesson describes the nature of energy and how it is transferred from one source into another. Additionally, it will describe the significance of energy in natural systems.
4. Kinetic Energy to Potential Energy: Relationship in Different Energy Types
This video defines and describes kinetic and potential energy. You'll learn how different types of energy can be classified as potential and kinetic. You'll also find out how kinetic and potential energy are transformed.
5. First Law of Thermodynamics: Law of Conservation of Energy
This video describes the first law of thermodynamics. Several examples of the application of this law are discussed. The significance of the law and its practical application are discussed as well.
6. Second Law of Thermodynamics: Entropy and Systems
In this lesson, we'll learn about the second law of thermodynamics. By studying this law, you'll understand how energy works and why we're all moving towards eventual chaos and disorder.
7. Work-Energy Theorem: Definition and Application
Work and energy are closely related in physics. In this lesson, you'll learn what that relationship is as well as how we can apply it to various situations.
8. What is Mechanical Energy? - Definition & Examples
In physics, energy is how work gets done. This video describes one important type of energy, mechanical energy, and provides examples of both kinetic and potential mechanical energy.
9. Conservation of Mechanical Energy
Energy comes in many forms and for any system can never be created or destroyed. This holds true for mechanical energy, which also obeys this law of conservation of energy. In this video lesson, you'll explore how mechanical energy is converted or transferred between forms and objects.
10. Power: Definition and Mathematics
Work involves moving an object with a force, but power tells us how quickly that work is done. In this lesson, you will learn about how power depends on both work and time as well as see examples of how to calculate power.
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