![]() ![]() On the other hand, forms of energy that are less concentrated, such as low temperature heat, vibrations, or sound waves, are much less useful. Concentrated forms of energy such as that stored in the nucleus of an atom, in chemical bonds, or in high-voltage electric devices are very useful for doing work. For example, the energy of motion (kinetic energy) of water falling over a dam can be used to turn a waterwheel to grind grain or make electricity.Įntropy is a measure of the distribution of energy. When energy is transferred from one object to another, or when it is transformed from one type to another, it can be used to do work. (Although Einstein later showed that for nuclear reactions energy could be turned into mass and visa versa). The first law of thermodynamics says energy can neither be created nor destroyed. In the simplest terms, the universe consists of four things space, time, mass and energy. Physicists use the term entropy to describe the change of useful energy to less useful heat. But it takes a lot of heat to do that, and that heat has to come from some other source of energy, like burning coal, or light from the sun. Yes, heat can be used to make steam and drive electric turbines. The lowest form of energy in terms of usefulness is heat. Users are required to: Exercise due diligence in ensuring the accuracy of the materials reproduced Indicate both the complete title of the materials reproduced, as well as the author organization and Indicate that the reproduction is a copy of an official work that is published by the Government of Canada and that the reproduction has not been produced in affiliation with or with the endorsement of the Government of Canada. Reuse: Information on this website has been posted with the intent that it be readily available for personal or public non-commercial use and may be reproduced, in part or in whole, and by any means, without charge or further permission, unless otherwise specified. Provenance: Original source: Environment Canada (), accessed via USGS: This reproduction is a copy of an official work that is published by the Government of Canada and the reproduction has not been produced in affiliation with or with the endorsement of the Government of Canada. For example, the energy of motion (kinetic energy) of water falling over a dam can be used to turn a waterwheel to grind grain or make electricity. The most useful energy or highest quality energy is something that we can use to do work. The second law of thermodynamics says that every time energy changes forms, some of it is turned into heat. But Einstein showed us that energy could be turned into mass and visa versa. ![]() In the simplest terms, the universe consists of four things: space, time, mass, and energy. Distinguish AC and DC electricity, identify the useful qualities of each, note which devices are associated with each, and describe the role of power inverters.Explain the relationship between the flow of current and magnetism, and show how this is the basis for electric motors and generators.State the differences between parallel and series circuits, and note the effects on the electric potential (measured in volts) and current (measured in amps). Identify the elements of an electrical circuit.volts, amps, watts, ohms, amp-hours, kilowatt-hours, etc.) ![]() The student will be able to match electrical quantities/properties with the various units of measure used in electrical science (e.g. Provide appropriate definitions for the following electrical terms: electron, electric charge, electric potential, resistance, current, power, conductor, semiconductor, and insulator. Distinguish the differences between energy, work, and power, and provide examples of each using appropriate units.Learning Goals: Students will be able to: The formulas will be there to help you see the relationships. While formulas will be used sometimes to help explain the fundamental principles, the point is not to be able to solve quantitative problems. This unit will introduce the basic concepts needed to understand the technologies discussed in this course. Comprehending how wind turbines make electricity means understanding something about power, work, and electromagnetism. To know how photovoltaic cells convert solar energy to electricity means understanding the fundamentals of electricity and light. To understand how sustainable technologies work, it is important to grasp certain basic principles. ![]()
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