1.You are asked to design a winch system for Santa's sleigh. Assume that Santa weighs 300 lbs, visits 10 houses an hour and requires a 20 foot lift at each house, what is the average power that the system will use if it is perfectly efficient? Express your answer in Watts.
2.The discharge from asugar beet plant causes the DO at the critical point to fall to 4.0 mg/L. The Meskhenet Stream has a negligible BOD and the initial deficit after the river and wastewater have mixed is zero. What DO will result if the concentration of the waste(Lw) is reduced by 50%? Assume that the flows remain the same and that the saturation value of DO is 10.83 mg/L in both cases.