The primary responsibility for a boy's studies lies with his House Master, but he is assisted by an additional director of studies, known as a tutor. Classes, colloquially known as "divs" (divisions), are organised on a School basis; the classrooms are separate from the houses. New school buildings have appeared for teaching purposes every decade or so since New Schools, designed by Henry Woodyer and built 1861-3. Despite the introduction of modern technology, the external appearance and locations of many of the classrooms have remained unchanged for a long time.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How often have new buildings for housing appeared at Eton?
Ah, so.. unanswerable

To minimize overall weight and size, miniature PM motors may use high energy magnets made with neodymium or other strategic elements; most such are neodymium-iron-boron alloy. With their higher flux density, electric machines with high-energy PMs are at least competitive with all optimally designed singly-fed synchronous and induction electric machines. Miniature motors resemble the structure in the illustration, except that they have at least three rotor poles (to ensure starting, regardless of rotor position) and their outer housing is a steel tube that magnetically links the exteriors of the curved field magnets.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How do PMs rate against other types of electric motors?
Ah, so.. least competitive

On 2 December 1942, as part of the Manhattan Project, another team led by Enrico Fermi was able to initiate the first artificial self-sustained nuclear chain reaction, Chicago Pile-1. Working in a lab below the stands of Stagg Field at the University of Chicago, the team created the conditions needed for such a reaction by piling together 400 short tons (360 metric tons) of graphite, 58 short tons (53 metric tons) of uranium oxide, and six short tons (5.5 metric tons) of uranium metal, a majority of which was supplied by Westinghouse Lamp Plant in a makeshift production process.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What project was Fermi working for?
Ah, so..
Manhattan