What is the difference between mechanical advantage and distance advantage? ​

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two

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