What is Energy?

About the 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.

About the 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).