Acarpenter builds an exterior house wall with a layer of wood 3.0 cm thick on the outside and a layer of styrofoam insulation 2.4 cm thick on the inside wall surface. the wood has k=0.080w/(m? k), and the styrofoam has k= 0.010 w/(m? k). the interior surface temperature is 20.0 ? c , and the exterior surface temperature is -13.0 ? c

a.)what is the temperature at the plane where the wood meets the styrofoam? celsius

b.)what is the rate of heat flow per square meter through this wall? /m^2

Explanation:

Given

thermal conductivity of wood

thermal conductivity of insulation

thickness of wood

thickness of insulation

we know heat Flow is given by

change in temperature

thickness

K=thermal conductivity

A=Area of cross-section

A is same

Suppose T is the temperature of Junction

as heat Flow is same thus

(b)Rate of heat flow

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles