Amaterial that provides little or no resistance to the flow of electric current is called a(n) (1 point) circuit. conductor. insulator. resistor.

What is the coefficient of kinetic friction μk between the block and the tabletop?

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)

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.