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In 1947, the first commercially produced microwave oven was about 6 feet tall, weighed about 750 lbs, and cost about $5,000 (equivalent to $68,227 in 2023). In 1967 the first more affordable, $495 (equivalent to $4,523 in 2023), and reasonably sized (counter-top) Radarange brand microwave oven was made available for sale, produced by Amana (a ...
The size of household microwave ovens can vary, but usually have an internal volume of around 20 liters (1,200 cu in; 0.71 cu ft), and external dimensions of approximately 45–60 cm (1 ft 6 in – 2 ft 0 in) wide, 35–40 cm (1 ft 2 in – 1 ft 4 in) deep and 25–35 cm (9.8 in – 1 ft 1.8 in) tall. [29]
The modern magnetron is a fairly efficient device. In a microwave oven, for instance, a 1.1-kilowatt input will generally create about 700 watts of microwave power, an efficiency of around 65%. (The high-voltage and the properties of the cathode determine the power of a magnetron.)
This set aside three bands for common carrier use, 3.7 to 4.2, 5.925 to 6.425 and 10.7 to 11.7 GHz. [7] So while TDX was still at the stage of only being a breadboard model, the decision was made to move ahead with a production system at the newer and slightly lower frequencies. In October 1946, the New York to Chicago route was selected as the ...
In 1947, Raytheon under Percy Spencer demonstrated the world's first microwave oven built at the company which was called the "Radarange". [305] 1945 Cruise control. Cruise control automatically controls the rate of motion of a motor vehicle. The driver sets the speed and the system will take over the throttle of the car to maintain the same speed.
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Edward Aloysius Murphy Jr. (January 11, 1918 – July 17, 1990 [1]) was an American aerospace engineer who worked on safety-critical systems. He is best known for his namesake " Murphy's law ", which is said to be "Anything that can go wrong will go wrong".
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