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Picture Pages is a 1978–1984 American educational television program aimed at preschool children, presented by Bill Cosby—teaching lessons on basic arithmetic, geometry, word association and drawing through a series of interactive lessons that used a workbook that viewers would follow along with the lesson.
A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to rotate and produce thermal energy (heat) in a process known as dielectric heating.
Due to their expense microwave ovens were initially used in institutional kitchens, but by 1986 roughly 25% of households in the U.S. owned one. Microwave heating became widely used as an industrial process in industries such as plastics fabrication, and as a medical therapy to kill cancer cells in microwave hyperthermy.
Air fryer; Bachelor griller; Barbecue grill; Beehive oven; Brasero; Brazier; Bread machine; Burjiko; Butane torch; Chapati maker; Cheesemelter; Chocolatera; Chorkor oven
A commercial combi steamer with 6 levels A household combi steamer with 4 levels, cabinet-mounted. Combi steamers (also called combi-steamers, hot-air steamers, combination steam-convection ovens, or simply combi ovens) are combination ovens that expand upon standard convection ovens in that they can also generate conventional moist steam or superheated steam and are capable of shifting ...
Conceptualized in 1946, Dr. Percy Spencer allegedly discovered the heating properties of microwaves while studying the magnetron. By 1947, the first commercial microwave was in use in Boston, Massachusetts. [19] Wall oven Wall ovens make it easier to work with large roasting pans and Dutch ovens. A width is typically 24, 27, or 30 inches.
The theoretical principles governing the operation of a maser were first described by Joseph Weber of the University of Maryland, College Park at the Electron Tube Research Conference in June 1952 in Ottawa, [2] with a summary published in the June 1953 Transactions of the Institute of Radio Engineers Professional Group on Electron Devices, [3] and simultaneously by Nikolay Basov and Alexander ...
The magic tee is a combination of E and H plane tees. Arm 3 forms an H-plane tee with arms 1 and 2. Arm 4 forms an E-plane tee with arms 1 and 2. Arms 1 and 2 are sometimes called the side or collinear arms. Port 3 is called the H-plane port, and is also called the Σ port, sum port or the P-port (for "parallel").