A woman drives a car from one city to another with different constant speeds along the trip. She drives at a speed of 95.0 km/h for 20.0 min, 65.0 km/h for 25.0 min, makes a stop for 30.0 min, then continues at 40.0 km/h for 35.0 min, at which point she reaches her destination. A) What is the total distance between her starting point and destination (in km)? B) What is the avg speed for the entire trip in (km/h)?

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)