Aparticle moves parallel to a septa train parked on a straight level track. the speed v of the particle is such that (v/c) 2 = 0.36. in the reference frame of the particle, the length of the train is 200 m. what is the length of the train for someone standing at the train station?

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