At the inlet to the ombustor of a supersonic ramjet(SCRAMjet), the flow Mach number is supersonic. For the fuel-air ratio(by mass) of 0.03 and a combustor exit temperature of 4800 degree R, calculate the inlet Mach number above which the flow will be unchoked. Assume one dimensional frictionless flow with lamda = 1.4, with the heat release per slug of fuel equal to 4.5x10^8 ft-lb. Also calculate change in entropy for the process

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

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

Define thermoplastic polymers and thermosetting polymers in terms of their structures, and (ii) describe briefly a process suitable for the production of products from each type of polymer.