A ray of light strikes a plane mirror at an angle of incidence equal to 35°. The angle between the incident ray and the reflected ray is
A)
70°
B)
0°
C)
55°
D)
35°

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

What are the north and south poles of a solenoid change with?

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)