Glacier thickness. We wish to estimate the local thickness of a glacier given only a topographic map of the glacier. Assume that the basal shear stress t_b = 0.8 bars = 8x10⁴ Pa, and that the walls are far enough away (the glacier is wide enough) that they play no role in supporting the ice. The contours on the map show that the ice slope is 10m/km or 0.01 at this location. Given the density of ice r = 917 kg/m³ and g = 9.8 m/s², estimate the ice thickness H at this location.