Aramjet engine provides thrust at 12.8 km altitude. the stagnation temperature at the inlet of the nozzle is 2030°c. sketch the variation of thrust force with respect to the flight mach number. (ra=0.32, rc=0.9, rn=0.9, p, = p6=0.2 atm, t = -51°c, no=0.99, qr=43 mj/kg, ac= 0.04 m²).

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?