Ascale should be used when taking photographs so that (multiple answer) the date and time of the photograph is known the size of the photograph can be determined the spatial relationship between various objects can be determined the image can be scaled so that an investigator knows the size of an object the direction that the camera was facing when the picture was taken can be determined

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)