Consider a minivan the roof of which can be approximated as a flat plate, 2.1 m wide and 3.5 m long. The sun beats down on the roof such that the net solar radiation absorbed is 2800 W. If the ambient air is 25ºC, the car is moving at 90 km/h, and the inside surface of the roof is heavily insulated, determine the steady-state temperature of the roof. Ignore radiation emitted from the roof and assume that the roof temperature is uniform along the minivan.

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp, max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?