Sources of Energy
The lesson covers different sources of energy, including renewable and non-renewable types. It explains how energy is used in society and discusses the environmental impacts of various energy sources. Specific examples include petroleum, natural gas, solar energy, and wind energy.
- 09:24 “like the poultry with the wheat, the animal excretion, the cabbages, and more of it. We have many of it. These are ways of producing what's energy. Rotitins can also be produced also. And those Rotitins, like when we get...”
- 10:10 “Or these are energy that can be replaced. Now, we have energy that can be replaced. After they are being used, we are to replace it back so that it can be able to be used in another form. When these energy are being used...”
- 10:58 “These are the energies that can never be replaced. After they are being used, they can never be replaced again. Now, we have, for example, as nuclear energy, when this one is being replaced in the environment, it can nev...”
Work, Energy and Power
This lesson covers the definitions of work, energy, and power. It includes calculations for work done, gravitational potential energy, and power in watts. The lesson also distinguishes between kinetic and potential energy and explains energy transformation and the law of conservation of energy.
- 12:53 “between two objects, due to their masses. Also, we have chemical energy. This is energy given by a charge particles called electrons. For example, lightning. It's an example of electrical energy in nature. Another form o...”
- 13:39 “Lights being powered by solar energy are very stored. Most especially, in the rural areas for generation of lights. Now, we want to talk about mechanical energy. Like we explained earlier, mechanical energy is known as m...”
- 10:30 “Take, for example, hot water and cold water. The temperature difference between them, most of the way, you pour hot water or cold water in hot water, the hot water will supply heat to the cold water. So that at the end o...”
Work, Energy and Power
This lesson covers the definitions of work, energy, and power. It explains potential and kinetic energy as forms of mechanical energy. The lesson also includes calculations related to work done and the concept of power as the rate of doing work.
- 00:00 “Hello students, my name is Uche Ugo, the subject is basic science and I will be taking the topic work energy and power. At the end of this lesson, I would expect each student to have achieved several objectives. The firs...”
- 09:52 “You prove what we call a teen plate. We also have chemical energy. Chemical energies are stored in bones. We have covalent and ionic bones. Now, these kind of energies exist in atomic, molecular or element states. Now, t...”
- 20:14 “Thanks for watching. My name is Uche Ugo, till next class.”