Suppose two students are asked to unpack identical cartons of books. One student completes the job in ten minutes, while the other takes twenty minutes. Which student did more work? Which student used more power? *

What is the momentum of a 2 kg object moving at 15 meters per second

The particles that are found in the nucleus of an atom are

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)