Energy Sources and Forms
This lesson explains the meaning of energy and identifies its various sources, including solar energy. It describes different forms of energy and how energy is transformed from one form to another. The lesson also covers the implications of using renewable and non-renewable energy.
- 02:28 “of energy? Where energy goes in from? Number one, we have the solar energy. The solar is from the sun. Solar power invests the energy of the sun through using a collector panel to create conditions that can then be turne...”
- 03:17 “solar panel fields are often used in deserts to get enough power to charge small substations and many homes use solar systems to provide for all water, cooling and supplement their electricity. In deserted areas where th...”
- 13:51 “mechanical energy to an electric energy. This electric city is then sent to electric car grid and to our homes where it is converted into light energy. Light and television, they begin to work. The sound energy you can h...”
Energy Transformation and Power
The lesson covers the process of energy transformation from one form to another, including potential and kinetic energy. It explains the laws of conservation of energy and provides examples of energy conversion, such as mechanical and solar energy. The lesson also defines power and presents its form
- 17:29 “When we talk about energy, we want to call renewable energy and non-renewable energy. For renewable energy, there are always clean energy obtained from natural resources and they are constantly replenished. When we talk...”
- 26:56 “we also have the same sequence, worked all over time, and at the end of the day, we have 200,000 all over 30,000 which is 6,000, 666.7 watts. Evaluation. At the end of the lesson, the student should be able to answer the...”
- 27:42 “Ehi. Till next time.”
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.
- 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...”
- 08:14 “So, the principle in which human beings can observe something, for example, I'm staring at the screen and I can see what is written on the screen because light falls on my eyes and reflects directly on the screen, allowi...”
- 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...”
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...”
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...”
- 00:02 “Good day, class. My name is Eme Nnamdi John. I'll be taking you on physics, through the topic, energy and society. Now, our first objective today, at the end of the study, Lena should be able to know one, the source of e...”
- 07:49 “The release energy is used in power electric plants and driving some locomotive for domestic uses. Wood is still a major energy resources for cooking in energy. Like I said before, that wood is what most of us we are usi...”
Gravitational Force and Fields
The lesson covers the concept of gravitational fields and the laws of gravitational force as proposed by Isaac Newton. It explains the relationship between masses and the distance between them in determining gravitational force.
- 08:07 “which you have that, we have it to be what the V is equal to, minus G, M, over what R. Now, this, that is, here, is a negative function, which indicates an infinity sign, or the zero sign, it indicates that, in this infi...”
- 24:19 “here, now let's get this, 6.67 times 42 times 10 raise to the power, let's have this 42 times 6.67 or give us as we have this 28 0.14 times 10 raise to the power minus 9, over”
- 09:40 “which one nearest to the sun, which is the Mercury, the one nearest to the sun is what, the Mercury, we have the Mercury, we have the Veno, we have the H, we have the mass, these are the four that are closer to the H, so...”