4. A train is running at a speed of 72 km/br, how far will it go in 7 seconds?

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

What is the relationship between the direction of motion of the balloon and the wind currents

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)