When the hydraulic conductivity ks = 10 mm/hr; effective matrix potential ns = 20 mm, and rainfall intensity i = 30 mm/hr , determine the amount of runoff generated when the runoff rate reaches 15 mm/hr? ( 2.7 mm or 0.21 mm or 18 mm or 0.67 mm)

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.