A house has $$155 \mathrm {~m} ^ { 2 } \text { of exterior walls consisting of } 2.9 \mathrm {~cm} \text { of exterior }$$ wood, $15 \mathrm {~cm}$ of insulation, and $2.0 \mathrm {~cm}$ of interior wood.
(a) On a winter day when the interior temperature is $20 ^ { \circ } \mathrm { C }$ and the exterior temperature is $- 2 ^ { \circ } \mathrm { C }$, what is the daily heat loss through the walls if they are insulated with fiberglass wool?
(b) What is the percent reduction in heat loss if the fiberglass wool is replaced with polystyrene foam sheets?

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The Answer of A house has $$155 \mathrm {~m} ^ { 2 } \text { of exterior walls consisting of } 2.9 \mathrm {~cm} \text { of exterior }$$ wood, $15 \mathrm {~cm}$ of insulation, and $2.0 \mathrm {~cm}$ of interior wood.
(a) On a winter day when the interior temperature is $20 ^ { \circ } \mathrm { C }$ and the exterior temperature is $- 2 ^ { \circ } \mathrm { C }$, what is the daily heat loss through the walls if they are insulated with fiberglass wool?
(b) What is the percent reduction in heat loss if the fiberglass wool is replaced with polystyrene foam sheets?

A House Has 155 m2 of exterior walls consisting of 2.9 cm of exterior 155 \mathrm {~m} ^ { 2 } \text { of exterior walls consisting of } 2.9 \mathrm {~cm} \text { of exterior }155 m2 of exterior walls consisting of 2.9 cm of exterior

A House Has $155 \mathrm {~m} ^ { 2 } \text { of exterior walls consisting of } 2.9 \mathrm {~cm} \text { of exterior }$