When you look ahead while driving, it is best to:
a. look beyond the car ahead of you
b. look only at the back of the car ahead of you
c. focus on the right side of your lane?

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)

What structural formula represents 4 electrons shared between two atoms?

If frequency goes up, what happens to wavelength? does it get shorter or longer?