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Energy

1. What is Energy?

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About this Lecture

Lecture

In this mini-lecture, we give an overview of what energy is, focusing in particular on: (i) different types of energy; (ii) closed systems and energy conservation; (iii) the definition of energy in physics and the SI unit of energy (the Joule); (iv) converting energy into usable forms; and (v) the details of thermal energy, mechanical energy, electrical energy, mechanical energy, and natural sources of energy.

Course

In this course, Professor Douglas Halliday (Durham University) explores energy. In the first mini-lecture, we discuss the big picture of energy, looking at types of energy, key principles, and units. In the second mini-lecture, we consider changes in energy by looking at examples of various energy exchanges involving kinetic and potential energy, heat, electrical energy, etc. The third mini-lecture introduces the concept of the conservation of energy and works through four related examples. In the fourth mini-lecture, we discuss the concept of work in greater detail and go through a couple of examples. In the fifth mini-lecture, we introduce the concepts of power and efficiency, working through some examples and looking at how to improve the efficiency of a system.

Lecturer

Douglas Halliday is a Professor of Physics at Durham University and a Director at the Durham Energy Institute. His research involves next-generation thin-film photovoltaic (solar) devices. Professor Halliday is also the Director of the Centres for Doctoral Training in Energy and Global Challenges Research as well as the Chair of the European Universities Association Energy and Environment Platform (EUA-EPUE).

Cite this Lecture

APA style

Halliday, D. (2022, January 14). Energy - What is Energy? [Video]. MASSOLIT. https://massolit.io/courses/energy/what-is-energy

MLA style

Halliday, Douglas. "Energy – What is Energy?." MASSOLIT, uploaded by MASSOLIT, 14 Jan 2022, https://massolit.io/courses/energy/what-is-energy

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