An ideal transformer has a 100-turn primary and 200-turn secondary. The primary is connected to a 110 V, 60 Hz source. The secondary winding supplies a load at 2 A at a lagging power factor (pf) of 0.85. Determine,

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Heat transfer by is the fastest mode of heat transfer that requires no intervening medium. a)-conduction b)-convection c)-radiation d)-conduction and convection

List 3 options on how to reduce knocking problens during engine process,