Moist air at 15°C, 1.3 atm, 63% relative humidity, and a volumetric flow rate of 770 m3/h enters a control volume at steady state and flows along a surface maintained at 187°C through which heat transfer occurs. Liquid water at 15°C is injected at a rate of 7 kg/h and evaporates into the flowing stream. For the control volume, cv = 0, and kinetic and potential energy effects are negligible. If moist air exits at 45°C, 1.3 atm, determine: the rate of heat transfer, in kW. the rate of entropy production, in kW/K.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed