A ball rolls down a roof that slopes down 35. The edge of the roof is 20m above the ground. The speed of the ball when it reaches the edge of the roof is 10.0m/s. i) Determine the how far from the building the ball hits the ground. ii) Determine the velocity of the ball when it hits the ground.

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