A ring of charge is centered at the origin in the vertical direction. The ring has a charge density of λ = 4.48 × 10 − 6 C/m λ=4.48×10−6 C/m and a radius of R = 2.71 cm. R=2.71 cm. Find the total electric field, E , E, of the ring at the point P = ( 1.10 m, 0.00 m). P=(1.10 m, 0.00 m). The Coulomb force constant is k = 1 / ( 4 π ϵ 0 ) = 8.99 × 10 9 N ⋅ m 2 / C 2 .

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)