Apiston–cylinder device initially contains 0.4 kg of nitrogen gas at 160 kpa and 140°c. nitrogen is now expanded isothermally to a pressure of 100 kpa. determine the boundary work done during this process. the properties of nitrogen are r = 0.2968 kj/kg·k and k = 1.4.

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.