Which situation most clearly presents an example of Newton's third law of motion? A. When a car runs into a stop sign, the stop sign will get knocked down.

B. When a girl on roller skates throws a basketball forward, she will roll backwards.

C. When dropped to the floor, a basketball stops after four bounces.

D. The heavier a rolling cart is, the less it will roll when a person pushes it.

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)