Problem

Urban canyons Because of the tall buildings and relatively narrow streets in some inner ci...

Urban canyons Because of the tall buildings and relatively narrow streets in some inner cities, the amount of sunlight illuminating these “canyons” is greatly reduced. If h is the average height of the buildings and w is the width of the street, the narrowness N of the street is defined by N = h/w. The angle θ of the horizon is defined by tan θ = N. (The value θ = 63° may result in an 85% loss of illumination.) Approximate the angle of the horizon for the following values of h and w.

(a) h = 400 ft, w = 80 ft


(b) h = 55 m, w = 30 m

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