Car 1 is parked when it is hit by car 2. the momentum of car 2 before the collision was 50 kg m/s. the momentum of car 1 after the collision is 10 kg m/s. what is the momentum of car 2 after the collision?

a)
0 kg m/s

b)
10 kg m/s

c)
40 kg m/s

d)
60 kg m/s

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