An electric pump at steady state is pumping water out of a pond that is at 2 bar at a rate of 50 kg/s. this water is then delivered at a pressure of 6 bar. the pumps efficiency is 70%, if electricity is 10 cents per kwh, estimate the hourly cost to run this pump. there is no heat transfer and change in kinetic and potential energy can be ignored.

Fluids at rest possess no flow energy. a)- true b)- false

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.