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.
- 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...”
- 22:40 “With this cost about it, we can be able to differentiate between renewable energy and non-renewable energy. Like I said, that energy is the ability to do work. Let me just simple our phrases for all. First of all, we can...”
- 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...”
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...”
- 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...”
- 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...”
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.
- 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...”
- 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...”
- 05:43 “What do I mean? Energy can be transferred from mechanical to heat, heat to mechanical, from light to heat, light to electrical or whatever. And it is also measured in Joe's meaning it has the same units as work done. And...”
Types of Production
This lesson defines production and explains its types, including primary, secondary, and tertiary production. It also discusses the extraction of raw materials and the transformation into finished goods.
- 08:24 “level of production. Constructive industry is also under secondary level. At this stage or at this type of production, those industries are concerned with the construction of activity, the industry is also under secondar...”
- 06:42 “Extractive is under primary production. Why manufacturing and construction is under secondary world production? Let us look at extractive production or the extractive industry as we call it. This is the primal sector. It...”
- 12:36 “abnormal raw material to be converted to finished product, okay? Production makes it possible for those raw materials to be able to get to that position where one can be able to use them. It brings opportunities to custo...”