本题目来源于试卷: Physics Unit14: Heat，类别为 通用国际物理
[单选题]
A layer of insulating materiayeq )wm ;bmee;.d*e i*l qawgxxc3 pv(eie8 2 lek (42a;with thermal conductivity K is placed on a layer of another material of thermal conductivity 2K. The layers have equalwxv( aqglap ek;38i x(e2ec42 thickness. What is the effective thermal conductivity of the composite sheet?
A. $3 \; K$
B. $1.5 \; K$
C. $K/3$
D. $2K/3$
参考答案: D
本题详细解析:
暂无
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