Problem: Kathmandu is home to a number of museums and art galleries, including the National Museum of Nepal and the Natural History Museum of Nepal. Nepal's art and architecture is an amalgamation of two ancient religions, Hinduism and Buddhhism. These are amply reflected in the many temples, shrines, stupas, monasteries, and palaces in the seven well-defined Monument Zones of the Kathmandu valley are part of a UNESCO World Heritage Site. This amalgamation is also reflected in the planning and exhibitions in museums and art galleries throughout Kathmandu and its sister cities of Patan and Bhaktapur. The museums display unique artifacts and paintings from the 5th century CE to the present day, including archeological exportation.
Along with the National Museum of Nepal, what notable Nepalese museum is present in Kathmandu?
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Answer: Natural History Museum of Nepal


Problem: On 25 February 1757, Burke signed a contract with Robert Dodsley to write a "history of England from the time of Julius Caesar to the end of the reign of Queen Anne", its length being eighty quarto sheets (640 pages), nearly 400,000 words. It was to be submitted for publication by Christmas 1758. Burke completed the work to the year 1216 and stopped; it was not published until after Burke's death, being included in an 1812 collection of his works, entitled An Essay Towards an Abridgement of the English History. G. M. Young did not value Burke's history and claimed that it was "demonstrably a translation from the French". Lord Acton, on commenting on the story that Burke stopped his history because David Hume published his, said "it is ever to be regretted that the reverse did not occur".
How many pages long was Burke's history of England contracted to be?
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Answer: 640 pages


Problem: The key advantage of the four-rail system is that neither running rail carries any current. This scheme was introduced because of the problems of return currents, intended to be carried by the earthed (grounded) running rail, flowing through the iron tunnel linings instead. This can cause electrolytic damage and even arcing if the tunnel segments are not electrically bonded together. The problem was exacerbated because the return current also had a tendency to flow through nearby iron pipes forming the water and gas mains. Some of these, particularly Victorian mains that predated London's underground railways, were not constructed to carry currents and had no adequate electrical bonding between pipe segments. The four-rail system solves the problem. Although the supply has an artificially created earth point, this connection is derived by using resistors which ensures that stray earth currents are kept to manageable levels. Power-only rails can be mounted on strongly insulating ceramic chairs to minimise current leak, but this is not possible for running rails which have to be seated on stronger metal chairs to carry the weight of trains. However, elastomeric rubber pads placed between the rails and chairs can now solve part of the problem by insulating the running rails from the current return should there be a leakage through the running rails.
How are stray earth currents kept to a manageable levels? 
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Answer:
by using resistors