Afuel gas is delivered to an industrial plant by a 3-in sch 40 commercial steel pipe, 80 m long. the gas has molecular weight of 18, viscosity of 1 × 10−5 kg/(m/s) and = 1.4. the gas is available at 1 mpa and 75℃ and the required delivery pressure is 500 kpa. the mach number at the entrance is given as 0.05. assuming that the delivery is adiabatic, calculate the exit temperature, the superficial mass velocity and the exit mach number. verify if the expansion is in the choking flow regime or not.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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

Arigid tank contains 10 kg of air at 137 kpa (abs) and 21°c. more air is added to the tank until the pressure and temperature rise to 242 kpa (abs) and 32°c, respectively. determine the amount of air added to the tank. [r-0.287 kj/kg k]