A confined aquifer has a thickness of l 0.0 m and a transmissivity of 1.30 × 10-3 m2/sec. When a 30-cm-diameter well is pumped at the rate of 30 m3 /hr, the drawdown of the piezometric surface at an observation well 30 m away is 9.60 m when it is not impacted by an aquifer boundary. If an identical well is installed in the same aquifer but located 30 m from a fully penetrating impermeable boundary, determine the drawdown at the boundary and at the well.

A cable passes around three 2-in.-radius pulleys and supports two blocks as shown. Two of the pulleys are locked to prevent rotation, while the third pulley is rotated slowly at a constant speed. Knowing that the coefficients of friction between the cable and the pulleys are ?s = 0.20 and ?k = 0.15, determine the largest weight A W which can be raised

(a) If pulley C is rotated,

(b) If pulley E is rotated.

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