Suppose a gas-filled incandescent light bulb is manufactured to have atmospheric pressure in it at 20.0°c. find the gauge pressure inside such a bulb when it is hot, assuming its average temperature is 58.0°c and neglecting any change in volume due to thermal expansion or gas leaks.

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