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- +psmyjt -eu-w lj:1a are ly*rdf0 6mfx /used to heat a house, why is it important that there be a vent for air to return to the furnace? What happens if this vent is blocked b/*6rym0fld fx y 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:
暂无
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