Shopware (Firm).
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English
Description
This program explores the basic principles behind the operation of AC and DC motors. An explanation is given about how one or more fixed magnets, either permanent or electromagnetic, can cause linear movement or rotation of a current-carrying wire. A hand rule is developed to predict motor force. Motor torque is explained as a prelude to the practical design of a direct current motor. Specific modules include Motors and Magnets, Current and Magnet...
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A professional energy audit is essential to transforming an older residence into a fuel-efficient home. The procedure lets homeowners know how quickly they are consuming energy and which parts of the dwelling need improvement to keep utility costs down. This program covers the step-by-step process of performing a home energy audit and gives details about the specific techniques and tools needed for the job. From assessing the building envelope to...
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Because heating and cooling utilizes the most energy in a home, one of the best decisions a homeowner can make to improve efficiency and lower bills is to upgrade these systems. This program lets viewers know how to install a new residential forced air furnace, with segments on disconnecting and removing the existing unit, inspecting and testing components, and details of the actual installation - all with an eye toward safety. Information is also...
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In this historical speech to the nation on April 30, 1973, President Nixon outlines the timeline of events of the Watergate Affair and announces the resignations of White House Chief of Staff Bob Haldeman, Assistant to the President for Domestic Affairs John Ehrlichman, and White House Counsel John Dean. Having thus addressed and dispensed with Watergate, Nixon says, of the 1,361 remaining days of his term, "I want these to be the best days in America's...
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This training video will demonstrate how to properly disassemble any kind of diesel engine, while inspecting each part for signs of wear, cracks, and damage. Viewers will learn the importance of part organization, detailed part inspection, proper part alignment, the use of special engine disassembly tools and the importance of thorough part cleaning.
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Solar electricity is a top choice for providing clean energy, and thanks to lower prices in getting a system up and running, consumer demand for this alternative keeps rising. This program explains exactly how to install a solar electric system, with segments on determining where to place the panels or modules; proper installation of both the mechanical and electrical components; testing the system, including grounding and voltage; and what to review...
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Besides helping a house use less energy, properly-installed insulation means greater comfort and less noise. This program explains insulating and air sealing as part of a new home build, and also as a retrofit to an existing home. Beginning with the establishment of energy goals, the video takes viewers through the process of choosing the right kind of insulation, evaluating and accessing current insulation on a retrofit, locating and sealing leaks,...
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This program traces the relationship between magnetism and electricity from the first accidental discovery of induced current. The concepts of electric and magnetic fields are introduced and their representation explored. The features of coils and solenoids are examined to develop the construction of practical electromechanical devices such as solenoid switches and electromagnets. Hand rules are introduced to help determine the alignment of currents...
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This program looks at physics principles behind AC and DC generators. The relationship between a changing magnetic field and the induction of electric current is examined. A hand rule is introduced to predict the generator effect in a linear length of conductor exposed to a changing magnetic field. The behavior of a rotating coil in a magnetic field leads to the practical construction of an AC motor. Split-ring commutator generators are introduced,...
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This video will review the most common methods for servicing and rebuilding a diesel engine cylinder head. It will explain how to disassemble, inspect, machine and reassemble different types of diesel cylinder heads, including the complexity of a thorough valve job and the importance of checking the head for cracks, warping, and other forms of damage.
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In this historical speech to the nation on August 15, 1973, President Nixon continues to deny knowledge of the Watergate Affair. "On May 22, I stated in very specific terms" I had no prior knowledge of the Watergate break-in; I neither took part in nor knew about any of the subsequent cover-up activities; I neither authorized nor encouraged subordinates to engage in illegal or improper campaign tactics. That was and that is the simple truth.
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A solar hot water system is an eco-friendly, cost-efficient alternative to gas or electric heaters, and with a conventional heater as a backup, can provide hot water even on cold, cloudy days. After a brief overview, this program explains the process of installing an active solar hot water system. Viewers learn the specific tools, hardware, plumbing, and electrical components needed, how to test the system, and key points about its operation to discuss...
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This program proceeds from the early music of the Eastern churches to the establishment of music as part of the Christian liturgy; the influence of Pope Gregory and the first composers for the Church; Notre-Dame de Paris and other religious centers; Leonin, Perotin, Guillaume de Machaut; the birth of secular song; Walther von der Vogelweide, Landini, Dunstable, and Dufay. Includes excerpts from: Traditional Gregorian, Hebrew, and Greek chants; Leonin's...
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Emphasizing hands-on practice, this program is an excellent tool for introducing the basics of linear measurement: its history, terminology, systems, and practical applications. Using both customary and metric rulers, Measurement: The Long and the Short of It will guide your students through the process of taking measurements, performing related calculations using whole numbers and fractions, and arriving at answers they can feel confident with. By...