Question: In 1644, René Descartes theorized that pain was a disturbance that passed down along nerve fibers until the disturbance reached the brain, a development that transformed the perception of pain from a spiritual, mystical experience to a physical, mechanical sensation[citation needed]. Descartes's work, along with Avicenna's, prefigured the 19th-century development of specificity theory. Specificity theory saw pain as "a specific sensation, with its own sensory apparatus independent of touch and other senses". Another theory that came to prominence in the 18th and 19th centuries was intensive theory, which conceived of pain not as a unique sensory modality, but an emotional state produced by stronger than normal stimuli such as intense light, pressure or temperature. By the mid-1890s, specificity was backed mostly by physiologists and physicians, and the intensive theory was mostly backed by psychologists. However, after a series of clinical observations by Henry Head and experiments by Max von Frey, the psychologists migrated to specificity almost en masse, and by century's end, most textbooks on physiology and psychology were presenting pain specificity as fact.
Try to answer this question if possible: What did Descartes think pain was?
Answer: a disturbance
Question: Sichuan came under the firm control of a Chinese central government during the Sui dynasty, but it was during the subsequent Tang dynasty where Sichuan regained its previous political and cultural prominence for which it was known during the Han. Chengdu became nationally known as a supplier of armies and the home of Du Fu, who is sometimes called China's greatest poet. During the An Lushan Rebellion (755-763), Emperor Xuanzong of Tang fled from Chang'an to Sichuan. The region was torn by constant warfare and economic distress as it was besieged by the Tibetan Empire.
Try to answer this question if possible: What revolt took place in the 7th century?
Answer: unanswerable
Question: For maximum life, capacitors usually need to be able to handle the maximum amount of reversal that a system will experience. An AC circuit will experience 100% voltage reversal, while under-damped DC circuits will experience less than 100%. Reversal creates excess electric fields in the dielectric, causes excess heating of both the dielectric and the conductors, and can dramatically shorten the life expectancy of the capacitor. Reversal ratings will often affect the design considerations for the capacitor, from the choice of dielectric materials and voltage ratings to the types of internal connections used.
Try to answer this question if possible: What does excess electric field present in the dielectric lead to?
Answer: heating of both the dielectric and the conductors
Question: Although Dominic and the early brethren had instituted female Dominican houses at Prouille and other places by 1227, some of the brethren of the order had misgivings about the necessity of female religious establishments in an order whose major purpose was preaching, a duty in which women could not traditionally engage. In spite of these doubts, women's houses dotted the countryside throughout Europe. There were seventy-four Dominican female houses in Germany, forty-two in Italy, nine in France, eight in Spain, six in Bohemia, three in Hungary, and three in Poland. Many of the German religious houses that lodged women had been home to communities of women, such as Beguines, that became Dominican once they were taught by the traveling preachers and put under the jurisdiction of the Dominican authoritative structure. A number of these houses became centers of study and mystical spirituality in the 14th century. There were one hundred and fifty-seven nunneries in the order by 1358. In that year, the number lessened due to disasters like the Black Death.
Try to answer this question if possible: Who did some early Dominican followers have trouble reconciling?
Answer:
female Dominican houses