Round 9: Tossup 4

Cylindrical structures used for this purpose only properly function if their radius exceeds a critical radius equal to k over h. Structures like junctions act as “bridges” that impede this purpose by having high psi-value. This purpose is the primary reason why a certain material may be “double-glazed” or “low e.” Materials used for this purpose are rated by their R-value, which is additive for materials (-5[1])layers stacked on top of each other. (10[1])Materials used for this purpose (-5[1])are formed by spinning them like cotton candy to create large pockets that trap air. (10[2])The component of the building envelope (10[1])used for this purpose is typically assessed for using an infrared camera. (10[1])For 10 points, (10[1])fiberglass wool is used in buildings for what purpose due to its low thermal conductivity? ■END■ (10[1]0[1])

ANSWER: thermal insulation [or building insulation; or word forms like thermal insulators; accept answers referring to retaining heat or preventing heat loss; prompt on answers referring to being energy efficient or minimizing energy usage or expenditure by asking “by performing what specific function?”; prompt on answers referring to reducing the amount of heating or air conditioning or HVAC necessary by asking “by performing what specific function?”; prompt on answers referring to temperature control or maintaining the temperature by asking “by doing what?”; prompt on efficiency; reject “heating” or answers referring to producing or providing or generating heat; reject answers specifying electrical insulation]
<GC, Physics> | Packet H - Yale A, Ohio State C, Illinois C, Virginia Tech B, MIT A
= Average correct buzzpoint

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