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All the electromagnetic motors, and that includes the types mentioned here derive the torque from the vector product of the interacting fields. For calculating the torque it is necessary to know the fields in the air gap . Once these have been established by mathematical analysis using FEA or other tools the torque may be calculated as the integral of all the vectors of force multiplied by the radius of each vector. The current flowing in the winding is producing the fields and for a motor using a magnetic material the field is not linearly proportional to the current. This makes the calculation difficult but a computer can do the many calculations needed.
 How are the very few calculations to determine torque done?
A: unanswerable

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The Crusades brought a shift in European trade routes that accelerated the decline of Kievan Rus'. In 1204 the forces of the Fourth Crusade sacked Constantinople, making the Dnieper trade route marginal. At the same time the Teutonic Knights (of the Northern Crusades) were conquering the Baltic region and threatening the Lands of Novgorod. Concurrently with it the Ruthenian Federation of Kievan Rus' started to disintegrate into smaller principalities as the Rurik dynasty grew. The local Orthodox Christianity of Kievan Rus', while struggling to establish itself in the predominantly pagan state and losing its main base in Constantinople was on the brink of extinction. Some of the main regional centres that developed later were Novgorod, Chernigov, Galich, Kiev, Ryazan, Vladimir-upon-Klyazma, Vladimir of Volyn and Polotsk.
What group was attacking the the Baltic Region in 1204?
A: Teutonic Knights

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The Ghoomar dance from Jodhpur Marwar and Kalbeliya dance of Jaisalmer have gained international recognition. Folk music is a large part of Rajasthani culture. Kathputli, Bhopa, Chang, Teratali, Ghindr, Kachchhighori, and Tejaji are examples of traditional Rajasthani culture. Folk songs are commonly ballads which relate heroic deeds and love stories; and religious or devotional songs known as bhajans and banis which are often accompanied by musical instruments like dholak, sitar, and sarangi are also sung.
What have folk songs from Jodhpur Marwar gained?
A: unanswerable

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The terms international policing, transnational policing, and/or global policing began to be used from the early 1990s onwards to describe forms of policing that transcended the boundaries of the sovereign nation-state (Nadelmann, 1993), (Sheptycki, 1995). These terms refer in variable ways to practices and forms for policing that, in some sense, transcend national borders. This includes a variety of practices, but international police cooperation, criminal intelligence exchange between police agencies working in different nation-states, and police development-aid to weak, failed or failing states are the three types that have received the most scholarly attention.
When did Sheptycki write about global policing?
A:
1995