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 material with thermal conduc+hg6.h*+ w:5uyf ua6brnjdf vtivity K is placed oi3) hdih*h qqz,v p8pdnf7c 49n a layer of another material of thermal conductivity 2K. The layers have equal thickness. What is the effective,i 3zpd)74hqc8f9qhi phvd*n 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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