3) Exceeding question A ball is launched from a cennon at some angle e. The moment it leaves the cannon, it has a velocity in the x direction of 20m/s, and a
velocity in the y direction of 50m/s. What angle was the cannon fired at? Show
work in the box below. (hint, recall properties of right triangles)

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