Which statement best describes the weather shown by the purple combination of semicircles and triangles on a line on a weather map? an occluded front can cause light to heavy precipitation that may last several days. a stationary front may produce rainy or snowy weather for several days. a warm front brings drizzly weather. a cold front can cause heavy rain, thunder, and lightning.

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)