Question: In 1824, the French physicist François Arago formulated the existence of rotating magnetic fields, termed Arago's rotations, which, by manually turning switches on and off, Walter Baily demonstrated in 1879 as in effect the first primitive induction motor.  In the 1880s, many inventors were trying to develop workable AC motors because AC's advantages in long-distance high-voltage transmission were counterbalanced by the inability to operate motors on AC. The first alternating-current commutatorless induction motors were independently invented by Galileo Ferraris and Nikola Tesla, a working motor model having been demonstrated by the former in 1885 and by the latter in 1887. In 1888, the Royal Academy of Science of Turin published Ferraris' research detailing the foundations of motor operation while however concluding that "the apparatus based on that principle could not be of any commercial importance as motor." In 1888, Tesla presented his paper A New System for Alternating Current Motors and Transformers to the AIEE that described three patented two-phase four-stator-pole motor types: one with a four-pole rotor forming a non-self-starting reluctance motor, another with a wound rotor forming a self-starting induction motor, and the third a true synchronous motor with separately excited DC supply to rotor winding. One of the patents Tesla filed in 1887, however, also described a shorted-winding-rotor induction motor. George Westinghouse promptly bought Tesla's patents, employed Tesla to develop them, and assigned C. F. Scott to help Tesla, Tesla left for other pursuits in 1889.  The constant speed AC induction motor was found not to be suitable for street cars but Westinghouse engineers successfully adapted it to power a mining operation in Telluride, Colorado in 1891. Steadfast in his promotion of three-phase development, Mikhail Dolivo-Dobrovolsky invented the three-phase cage-rotor induction motor in 1889 and the three-limb transformer in 1890. This type of motor is now used for the vast majority of commercial applications. However, he claimed that Tesla's motor was not practical because of two-phase pulsations, which prompted him to persist in his three-phase work. Although Westinghouse achieved its first practical induction motor in 1892 and developed a line of polyphase 60 hertz induction motors in 1893, these early Westinghouse motors were two-phase motors with wound rotors until B. G. Lamme developed a rotating bar winding rotor. The General Electric Company began developing three-phase induction motors in 1891. By 1896, General Electric and Westinghouse signed a cross-licensing agreement for the bar-winding-rotor design, later called the squirrel-cage rotor. Induction motor improvements flowing from these inventions and innovations were such that a 100 horsepower (HP) induction motor currently has the same mounting dimensions as a 7.5 HP motor in 1897.
Is there an answer to this question: What's another name for the bar-winding-rotor?

Answer: squirrel-cage


Question: The University of Kansas is a large, state-sponsored university, with five campuses. KU features the College of Liberal Arts & Sciences, which includes the School of the Arts and the School of Public Affairs & Administration; and the schools of Architecture, Design & Planning; Business; Education; Engineering; Health Professions; Journalism & Mass Communications; Law; Medicine; Music; Nursing; Pharmacy; and Social Welfare. The university offers more than 345 degree programs.
Is there an answer to this question: At least how many different non-degree granting programs exist at KU?

Answer: unanswerable


Question: By the late 1950s, the motion picture business was again changing. The combination of the studio/theater-chain break-up and the rise of television saw the reduced audience size for cinema productions. The Music Corporation of America (MCA), then predominately a talent agency, had also become a powerful television producer, renting space at Republic Studios for its Revue Productions subsidiary. After a period of complete shutdown, a moribund Universal agreed to sell its 360-acre (1.5 km²) studio lot to MCA in 1958, for $11 million, renamed Revue Studios. MCA owned the studio lot, but not Universal Pictures, yet was increasingly influential on Universal's product. The studio lot was upgraded and modernized, while MCA clients like Doris Day, Lana Turner, Cary Grant, and director Alfred Hitchcock were signed to Universal Pictures contracts.
Is there an answer to this question: In what year did Universal sell its 360-acre lot to MCA?

Answer: 1958


Question: Since their domestication, a large number of breeds of chickens have been established, but with the exception of the white Leghorn, most commercial birds are of hybrid origin. In about 1800, chickens began to be kept on a larger scale, and modern high-output poultry farms were present in the United Kingdom from around 1920 and became established in the United States soon after the Second World War. By the mid-20th century, the poultry meat-producing industry was of greater importance than the egg-laying industry. Poultry breeding has produced breeds and strains to fulfil different needs; light-framed, egg-laying birds that can produce 300 eggs a year; fast-growing, fleshy birds destined for consumption at a young age, and utility birds which produce both an acceptable number of eggs and a well-fleshed carcase. Male birds are unwanted in the egg-laying industry and can often be identified as soon as they are hatch for subsequent culling. In meat breeds, these birds are sometimes castrated (often chemically) to prevent aggression. The resulting bird, called a capon, has more tender and flavorful meat, as well.
Is there an answer to this question: How can you normally identify a cock when it doesn't hatch?

Answer:
unanswerable