The flow of energy into and out of a system is known as

An oil pump operating at steady state delivers oil at a rate of 12 lb/s through a 1-in-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 70 Ib/ft3 and experiences a pressure rise from inlet to exit of 40 Ib:/in?. There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp.

The boundary work associated with a constant volume process is constant

2. A tank contains 1 kg mass gas whose density is 700 kg/m3. The pressure is increased from 1 bar to 3 bar. The approximate specific boundary work of the system is a. Cannot be find since some data is missingb. 285 kJ/kgc. 0 kJ/kgd. 0.285 kJ/kg

A tank initially contained 500 kg of nitrogen. The tank has 4 valves connected to it. 20 kg of nitrogen entered the tank though valve 1, 70 kg of nitrogen left the tank through valve 2, 125 kg of nitrogen entered the tank through valve 3, and 200 kg of nitrogen left the tank through valve 4. The final mass of nitrogen in the tank in kg is