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Various Kenmore kitchen stoves and other appliances at a Sears Outlet store in 2020. Kenmore's upscale line of products is known as the Elite line. Kenmore also has a professional line of appliances called Kenmore Pro. As of January 2019, the Kenmore brand had over 50 products listed as top performers on the non-profit website Consumer Reports ...
A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [ 1 ]
A microwave oven, c. 2005 Simulation of the electric field inside a microwave oven for the first 8 ns of operation. A microwave oven heats food by passing microwave radiation through it. Microwaves are a form of non-ionizing electromagnetic radiation with a frequency in the so-called microwave region (300 MHz to 300 GHz).
Indonesian traditional brick stove, used in some rural areas An 18th-century Japanese merchant's kitchen with copper Kamado (Hezzui), Fukagawa Edo Museum. Early clay stoves that enclosed the fire completely were known from the Chinese Qin dynasty (221 BC – 206/207 BC), and a similar design known as kamado (かまど) appeared in the Kofun period (3rd–6th century) in Japan.
The cooktop is then switched to maximum heating power. When the test block temperature reaches 144 °F (80 °C) above the initial room temperature, the cooktop power is immediately reduced to 25% ± 5% of its maximum power for 15 minutes, after which the heat in the test block is measured. [23]
The magnetron remains the essential radio tube for shortwave radio signals of all types. It not only changed the course of the war by allowing us to develop airborne radar systems, it remains the key piece of technology that lies at the heart of your microwave oven today. The cavity magnetron's invention changed the world. [5]
Different compounds convert microwave radiation to heat by different amounts. This selectivity allows some parts of the object being heated to heat more quickly or more slowly than others (particularly the reaction vessel). Microwave heating can have certain benefits over conventional ovens: reaction rate acceleration; milder reaction conditions
Practical use of microwave frequencies did not occur until the 1940s and 1950s due to a lack of adequate sources, since the triode vacuum tube (valve) electronic oscillator used in radio transmitters could not produce frequencies above a few hundred megahertz due to excessive electron transit time and interelectrode capacitance. [30]
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