Solving with the Speed equation: v= d/t (add to notes if desired)
3. Juan has ridden his bike a total distance of 20 km. If his average speed was 15km/h,
how much time did he ride for?
a)
What is given in the problem? (Circle)
b) What are we trying to find? (Square)
What will be the units to our solution?
d) Plug into the speed equation and solve.

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