6.7 A JT9D high-bypass-ratio turbofan engine at maximum static power on a sea-level, standard day ( P 0 ¼ 14.696 psia, T 0 ¼ 518.7 8 R, and V 0 ¼ 0) has the data listed in Appendix B. (a) .Assume g ¼ 1.4. (b) and high-pressure compressors. Assume g ¼ 1.4 for the low-pressure compressor and g ¼ 1.39 for the high-pressure compressor. (c) .Assume g ¼ 1.35. (d) Calculate the power (horsepower and kilowatts) into the fan and compressors. Assume Rg c

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg. a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg. m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?

Aparticle moves along a straight line such that its acceleration is a=(4t^2-2) m/s, where t is in seconds. when t = 0, the particle is located 2 m to the left of the origin, and when t = 2, it is 20 m to the left of the origin. determine the position of the particle when t=4s.