The force f, of the wind blowing against a building is given by f=cdrhov2 a/2, where v is the wind speed, rho the density of the air, a the cross-sectional area of the building, and cd is a constant termed the drag coefficient. (a) determine the dimensions of the drag coefficient. (b) is this a homogeneous or a non-homogeneous equation? how can you tell? (c) in what unit system is the coefficient defined?