The speed of sound in air at 0 degree Celcius is 331 m/s. It increases by 0.6 m/s every 1 degree rise in temperature. While hiking through a canyon, Scary Carrie lets out a scream. An echo (reflection of the scream off a nearby canyon wall at a distance of 220 m) is heard 1.26 seconds after the scream. Calculate the temperature of air. Show all work.

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