What is the final momentum of each canoe if they are pushed apart with a force of 56 N for 1.3 s?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Hydrogen and helium are both members of?

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