Hermes Simmons pulls a box along a frictionless surface with a rope that makes a 60 degree angle relative to the ground. The tension in the rope is 10 N, the box moves total horizontal distance of 4 m, and it takes him 2 seconds to this. What's Hermes' power output in Watts?

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)