本题目来源于试卷: gc textbook chater 14 heat，类别为 IB物理学
[问答题]
When hot-air furnaces d2k1rjj 6ge swp.*i v3are used to heat a house, why isp(vd0e// sciq) ojd1 i 48p mohfjfw;2wd 6m2a it important that there be a vent eajd qdj6 p (2sm8)wd mo/1 p2ovcif4/h;wf0ifor air to return to the furnace? What happens if this vent is blocked by a bookcase?
参考答案:
A hot-air furnace heats primarily by air
convection. A return path (often called
a “cold air return”) is necessary for the convective currents to be able to
completely circulate. If the flow of air
is blocked, then the convective currents and the heating process will be
interrupted. Heating will be less
efficient and less uniform if the convective currents are prevented from
circulating.
本题详细解析:
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