Astorm blows wind across the top of a roof at a speed of v = 26.3 m/s. assume the air on the lower side of the roof (inside) is at rest and the roof is flat and has an area a = 38.9 m². the density of air is 1.28 kg/m³.1) what is the pressure differential across the top and bottom of the roof? 2) what is the net lift force on the roof due to the storm?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

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

The amount of work done is determined by 2 factors. describe an example of work (using the scientific definition) list the 2 factors that determine the amount of work done.