Air enters the turbine of a jet engine at a rate of 40 kg/s. For every kg of air, 1/40 of fuel enters. Combustion products are discharged with an absolute pressure of 750 kPa and temperature of 120C. Determine the average velocity at the exit when the exit has a diameter of 0.3m.(Hint: Class)

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling