Water at 25C is flowing in a covered irrigation ditch below ground. Every 100ft, there is a vent line with a 1.0 in. inside diameter and it is 1.0ft long to the outside atmosphere at 25C. There are 10 vents in the 1000ft ditch. The outside air can be assumed to be dry. Calculate the total evaporation loss of water in lbm/ day. Assume that the partial pressure of water vapor at the surface of the water is the vapor pressure, 23.76mmHg at 25C. The diffusivity is 0.26104m2/s. 3. Determine the molecular weight of marsian atmosphhere