Which is a drawback to the extensive use of solar energy? a. it is nonrenewable and usually unavailable at night. b. it produces toxic pollution. c. it requires equipment and installation that are expensive. d. it is available only at night.

Name the non metal condut electricity

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 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 19.0 ∘c , and the exterior surface temperature is -15.0 ∘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

What is the single most important equation in all of physics?